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Mineral Resources > Online Spatial Data

National Geochronological Database

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Sloan, Jan

Originator: Henry, Christopher D.

Originator: Hopkins, Melanie

Originator: Ludington, Stephen D.

Originator: Zartman, Robert E.

Originator: Bush, Charles A.

Originator: Abston, Carl

Title: National Geochronological Database

Publication_Date: 2003

Geospatial_Data_Presentation_Form: relational database

Series_Information:

Series_Name: Open-File Report

Issue_Identification: 03-236

Publication_Information:

Publication_Place: Menlo Park, California

Publisher: U.S. Geological Survey

Online_Linkage: <http://mrdata.usgs.gov/geochron/>

Description:

Abstract:

Radiometric ages of geological materials by K-Ar, Rb-Sr, Sm-Nd, fission track, and U-Th-Pb dating methods. A revision of DDS-14 correcting locations and providing the data in more convenient formats.

Purpose:

This database is a minor revision of DDS-14, with some corrections.

Time_Period_of_Content:

Time_Period_Information:

Multiple_Dates/Times:

Single_Date/Time:

Calendar_Date: 1995

Single_Date/Time:

Calendar_Date: 2003

Currentness_Reference:

Publication dates of the initial database (DDS-14) and the revision (OFR 2003-236).

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -179.119444

East_Bounding_Coordinate: -67.021389

North_Bounding_Coordinate: 71

South_Bounding_Coordinate: 26.5625

Access_Constraints: none

Use_Constraints: none

Keywords:

Place:

Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4

Place_Keyword: fUS01 = Alabama

Place_Keyword: fUS02 = Alaska

Place_Keyword: fUS04 = Arizona

Place_Keyword: fUS05 = Arkansas

Place_Keyword: fUS06 = California

Place_Keyword: fUS08 = Colorado

Place_Keyword: fUS09 = Connecticut

Place_Keyword: fUS10 = Delaware

Place_Keyword: fUS12 = Florida

Place_Keyword: fUS13 = Georgia

Place_Keyword: fUS16 = Idaho

Place_Keyword: fUS17 = Illinois

Place_Keyword: fUS18 = Indiana

Place_Keyword: fUS19 = Iowa

Place_Keyword: fUS20 = Kansas

Place_Keyword: fUS21 = Kentucky

Place_Keyword: fUS22 = Louisiana

Place_Keyword: fUS23 = Maine

Place_Keyword: fUS24 = Maryland

Place_Keyword: fUS25 = Massachusetts

Place_Keyword: fUS26 = Michigan

Place_Keyword: fUS27 = Minnesota

Place_Keyword: fUS28 = Mississippi

Place_Keyword: fUS29 = Missouri

Place_Keyword: fUS30 = Montana

Place_Keyword: fUS31 = Nebraska

Place_Keyword: fUS32 = Nevada

Place_Keyword: fUS33 = New Hampshire

Place_Keyword: fUS34 = New Jersey

Place_Keyword: fUS35 = New Mexico

Place_Keyword: fUS36 = New York

Place_Keyword: fUS37 = North Carolina

Place_Keyword: fUS38 = North Dakota

Place_Keyword: fUS39 = Ohio

Place_Keyword: fUS40 = Oklahoma

Place_Keyword: fUS41 = Oregon

Place_Keyword: fUS42 = Pennsylvania

Place_Keyword: fUS44 = Rhode Island

Place_Keyword: fUS45 = South Carolina

Place_Keyword: fUS46 = South Dakota

Place_Keyword: fUS47 = Tennessee

Place_Keyword: fUS48 = Texas

Place_Keyword: fUS49 = Utah

Place_Keyword: fUS50 = Vermont

Place_Keyword: fUS51 = Virginia

Place_Keyword: fUS53 = Washington

Place_Keyword: fUS54 = West Virginia

Place_Keyword: fUS55 = Wisconsin

Place_Keyword: fUS56 = Wyoming

Theme:

Theme_Keyword_Thesaurus: General glossary for mineral resources spatial data

Theme_Keyword: comma-delimited text

Theme_Keyword: KML

Theme_Keyword: shapefile

Theme_Keyword: tab-delimited text

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus

Theme_Keyword: geochronology

Theme_Keyword: geologic history

Theme_Keyword: potassium-argon analysis

Theme_Keyword: rubidium-strontium analysis

Theme_Keyword: uranium-lead analysis

Theme_Keyword: uranium-thorium analysis

Browse_Graphic:

Browse_Graphic_File_Name: <http://mrdata.usgs.gov/geochron/ofr-2003-236.png>

Browse_Graphic_File_Description:

Sample locations in the conterminous United States, (768 x 512 pixels)

Browse_Graphic_File_Type: PNG

Data_Quality_Information:

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Zartman, Robert E.

Originator: Bush, Charles A.

Originator: Abston, C. C.

Publication_Date: 1995

Title: National geochronological and natural radioelement data bases

Series_Information:

Series_Name: Data Series

Issue_Identification: 14

Publication_Information:

Publisher: U.S. Geological Survey

Publication_Place: Denver, Colorado

Type_of_Source_Media: digital files on CD-ROM

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1995

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: DDS-14

Source_Contribution:

Original database used by compilers of OFR-2003-236; corrections to some of the data are described at <http://geopubs.wr.usgs.gov/open-file/of03-236/>

Process_Step:

Process_Description:

Copied information from OFR 2003-236, added documentation, reformatted, and in some cases eliminated duplication, eliminated explicit uninformative values (for example "Unk" in many fields). Created specialized interfaces and report formats as well as web services and download packages.

Process_Date: 20111221

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Peter N Schweitzer

Contact_Organization: USGS ER GD

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing address

Address: 12201 Sunrise Valley Drive

City: Reston

State_or_Province: VA

Postal_Code: 20192-0002

Country: USA

Contact_Voice_Telephone: 703-648-6533

Contact_Facsimile_Telephone: 703-648-6252

Contact_Electronic_Mail_Address: pschweitzer@usgs.gov

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Point

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Entity point

Point_and_Vector_Object_Count: 18576

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Geographic_Coordinate_Units: decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1927

Ellipsoid_Name: Clarke 1866

Semi-major_Axis: 6378206.4

Denominator_of_Flattening_Ratio: 294.98

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: main

Entity_Type_Definition: Sample locations and characteristics

Attribute:

Attribute_Label: recno

Attribute_Definition:

Record ID.

Sample identifier, links site description with analytical results. Integer values. Int of width 5.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 18669

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: longitude

Attribute_Definition:

Geographic longitude.

Geographic longitude in decimal degrees, NAD27. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 28 records have no value for longitude.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -179.119444

Range_Domain_Maximum: -67.021389

Attribute:

Attribute_Label: latitude

Attribute_Definition:

Geographic latitude.

Geographic latitide in decimal degrees, NAD27. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 28 records have no value for latitude.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 26.5625

Range_Domain_Maximum: 71

Attribute:

Attribute_Label: longdeg

Attribute_Definition:

Longitude degrees.

Degrees of longitude, NAD27. Integer values. Int of width 5.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 28 records have no value for longdeg.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 67

Range_Domain_Maximum: 179

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: longmin

Attribute_Definition:

Longitude minutes.

Minutes of longitude, NAD27. Integer values. Int of width 5.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 30 records have no value for longmin.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 59

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: longsec

Attribute_Definition:

Longitude seconds.

Seconds of longitude, NAD27. Integer values. Int of width 5.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 30 records have no value for longsec.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 60

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: west

Attribute_Definition:

Longitude hemisphere.

Hemisphere of longitude, E or W. Textual values of no more than 1 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 29 records have no value for west.

Attribute:

Attribute_Label: latdeg

Attribute_Definition:

Latitude degrees.

Degrees of latitude, NAD27. Integer values. Int of width 5.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 28 records have no value for latdeg.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 25

Range_Domain_Maximum: 71

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: latmin

Attribute_Definition:

Latitude minutes.

Minutes of latitude, NAD27. Integer values. Int of width 5.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 31 records have no value for latmin.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 60

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: latsec

Attribute_Definition:

Latitude seconds.

Seconds of latitude, NAD27. Integer values. Int of width 5.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 30 records have no value for latsec.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 60

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: north

Attribute_Definition:

Latitude hemisphere.

Hemisphere of latitude, N or S. Textual values of no more than 1 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 29 records have no value for north.

Attribute:

Attribute_Label: country

Attribute_Definition:

Country.

Country of site (US). Textual values of no more than 2 characters.

Attribute:

Attribute_Label: state

Attribute_Definition:

State or province.

State two letter postal abbreviation. Textual values of no more than 2 characters.

Attribute:

Attribute_Label: county

Attribute_Definition:

County.

County name, occasionally more than one name is given. Textual values of no more than 35 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 628 records have no value for county.

Attribute:

Attribute_Label: quadscale

Attribute_Definition:

Quadrangle map scale.

Map quadrangle scale. Textual values of no more than 9 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 63 records have no value for quadscale.

Attribute:

Attribute_Label: quadname

Attribute_Definition:

Quadrangle map name.

Map quadrangle name. Textual values of no more than 69 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 117 records have no value for quadname.

Attribute:

Attribute_Label: sampsour

Attribute_Definition:

Source of sample.

General type of material sampled or geographic feature from which the sample was taken. Textual values of no more than 38 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 371 records have no value for sampsour.

Attribute:

Attribute_Label: rockname

Attribute_Definition:

Rock name.

Lithologic terms describing the sample. Textual values of no more than 35 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 3 records have no value for rockname.

Attribute:

Attribute_Label: descrip

Attribute_Definition:

Description.

Further description of the sampled material, often includes a geologic unit or structural element within the unit. Textual values of no more than 257 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 2385 records have no value for descrip.

Attribute:

Attribute_Label: labs

Attribute_Definition:

Laboratories.

Organizations whose laboratories provided the analyses. Textual values of no more than 107 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 729 records have no value for labs.

Attribute:

Attribute_Label: compiled

Attribute_Definition:

Compiler name.

Name of the person who compiled the data. Textual values of no more than 17 characters.

Attribute:

Attribute_Label: datecomp

Attribute_Definition:

Date compiled.

Date record information was compiled, as year and month formatted as YYYY MM. Textual values of no more than 6 characters.

Attribute:

Attribute_Label: locprec

Attribute_Definition:

Precision of location.

Comments on the precision of the location given. Textual values of no more than 65 characters.

Attribute:

Attribute_Label: loccomm

Attribute_Definition:

Location comment.

General comments on the location given. Textual values of no more than 255 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 2773 records have no value for loccomm.

Attribute:

Attribute_Label: ref

Attribute_Definition:

Reference.

Primary bibliographic reference in which the dates were published. Textual values of no more than 469 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 2 records have no value for ref.

Attribute:

Attribute_Label: ref2

Attribute_Definition:

Reference addition.

Additional text of the bibliographic reference. Textual values of no more than 237 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 17856 records have no value for ref2.

Detailed_Description:

Entity_Type:

Entity_Type_Label: FT

Entity_Type_Definition: Fission track dating results, observations, and parameters

Attribute:

Attribute_Label: recno

Attribute_Definition:

Record ID.

Sample identifier, a value of main:recno. Integer values. Int of width 5.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 18669

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: ftrecno

Attribute_Definition:

Analysis ID.

Sequence number, for this sample, of this analysis. Integer values. Int of width 5.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 5

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: ftage

Attribute_Definition:

Calculated age.

Age estimate in millions of years. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 21 records have no value for ftage.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.02

Range_Domain_Maximum: 2346

Attribute:

Attribute_Label: fterr

Attribute_Definition:

Age uncertainty.

Uncertainty of the age estimate attributable to the analytical method, in millions of years. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 189 records have no value for fterr.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.04

Range_Domain_Maximum: 1000

Attribute:

Attribute_Label: ftmin

Attribute_Definition:

Rock or mineral analyzed.

Rock or mineral analyzed. Textual values of no more than 12 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 11 records have no value for ftmin.

Attribute:

Attribute_Label: ftlabno

Attribute_Definition:

Lab sample ID.

Identifier for this analysis assigned by the laboratory. Textual values of no more than 27 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 9 records have no value for ftlabno.

Attribute:

Attribute_Label: ftdeccon

Attribute_Definition:

Decay constants.

Radioactive decay constants used in calculations. Textual values of no more than 9 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 547 records have no value for ftdeccon.

Attribute:

Attribute_Label: trackdens

Attribute_Definition:

Track density.

Track density (count per square cm). Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 372 records have no value for trackdens.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 1123

Attribute:

Attribute_Label: fosstrack

Attribute_Definition:

Fossil tracks counted.

Fossil track density (count per square cm). Integer values. Int of width 5.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 435 records have no value for fosstrack.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 4152

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: indudens

Attribute_Definition:

Induced track density.

Induced track density (count per square cm). Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 372 records have no value for indudens.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.0072

Range_Domain_Maximum: 1479

Attribute:

Attribute_Label: indutrack

Attribute_Definition:

Induced tracks.

Induced tracks counted. Integer values. Int of width 5.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 437 records have no value for indutrack.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 10073

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: ratiotrack

Attribute_Definition:

Ratio of total to induced tracks.

Ratio of spontaneous to induced tracks. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 1277 records have no value for ratiotrack.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.0083

Range_Domain_Maximum: 20.874

Attribute:

Attribute_Label: neutflux

Attribute_Definition:

Neutron flux density.

Thermal neutron flux used in irradiation (neutrons per square cm). Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 293 records have no value for neutflux.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.122

Range_Domain_Maximum: 8.8

Attribute:

Attribute_Label: ft_u_ppm

Attribute_Definition:

Uranium concentration.

Total uranium concentration in the sample, in parts per million by weight. Textual values of no more than 8 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 986 records have no value for ft_u_ppm.

Attribute:

Attribute_Label: addref

Attribute_Definition:

Bibliographic references.

Additional bibliographic reference information for this analysis. Textual values of no more than 29 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 1391 records have no value for addref.

Attribute:

Attribute_Label: ftagecom

Attribute_Definition:

Age comments.

Comments on the age estimate, typically provides context for the age. Textual values of no more than 134 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 404 records have no value for ftagecom.

Attribute:

Attribute_Label: ftsampcom

Attribute_Definition:

Sample comments.

Comments on the sample analyzed. Textual values of no more than 75 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 963 records have no value for ftsampcom.

Attribute:

Attribute_Label: ftanalcom

Attribute_Definition:

Analytical comments.

Comments on the analytic method used. Textual values of no more than 134 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 1140 records have no value for ftanalcom.

Attribute:

Attribute_Label: ftothcom

Attribute_Definition:

Other comments.

Other comments pertinent to this analysis. Textual values of no more than 255 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 811 records have no value for ftothcom.

Detailed_Description:

Entity_Type:

Entity_Type_Label: K_Ar

Entity_Type_Definition:

Potassium-Argon and Argon-Argon radiometric age results, observations, and parameters

Attribute:

Attribute_Label: recno

Attribute_Definition:

Record ID.

Sample identifier, a value of main:recno. Integer values. Int of width 5.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 18669

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: karrecno

Attribute_Definition:

Analysis ID.

Sequence number, for this sample, of this analysis. Integer values. Int of width 5.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 6

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: karage

Attribute_Definition:

Calculated age.

Age estimate in millions of years. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 70 records have no value for karage.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -0.09

Range_Domain_Maximum: 6882.45

Attribute:

Attribute_Label: karerr

Attribute_Definition:

Age uncertainty.

Uncertainty of the age estimate attributable to the analytical method, in millions of years. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 1752 records have no value for karerr.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 940

Attribute:

Attribute_Label: karmin

Attribute_Definition:

Rock or mineral analyzed.

Rock or mineral analyzed. Textual values of no more than 47 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 127 records have no value for karmin.

Attribute:

Attribute_Label: karanaltype

Attribute_Definition:

Type of analysis.

Specific type of analytic method used. Textual values of no more than 46 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 83 records have no value for karanaltype.

Attribute:

Attribute_Label: karlabno

Attribute_Definition:

Lab sample ID.

Identifier for this analysis assigned by the laboratory. Textual values of no more than 34 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 10 records have no value for karlabno.

Attribute:

Attribute_Label: kardeccon

Attribute_Definition:

Decay constants.

Radioactive decay constants used in calculations. Textual values of no more than 36 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 5 records have no value for kardeccon.

Attribute:

Attribute_Label: k2opct

Attribute_Definition:

K2O concentration.

Potash concentration as weight percent of the sample. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 2562 records have no value for k2opct.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 23233

Attribute:

Attribute_Label: 40arrad

Attribute_Definition:

Radiogenic argon-40 concentration.

Concentration of radiogenic 40Ar. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 2622 records have no value for 40arrad.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -0.0063

Range_Domain_Maximum: 2453

Attribute:

Attribute_Label: pctradar

Attribute_Definition:

Percent radiogenic argon.

Percent of argon that is radiogenic. Integer values. Int of width 8.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 2194 records have no value for pctradar.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 86868787

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: sampsuit

Attribute_Definition:

Sample suite number.

Group identifier of related samples. Integer values. Int of width 5.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 14168 records have no value for sampsuit.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 7

Range_Domain_Maximum: 641

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: addref

Attribute_Definition:

Bibliographic references.

Additional bibliographic reference information for this analysis. Textual values of no more than 51 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 1391 records have no value for addref.

Attribute:

Attribute_Label: karcomm

Attribute_Definition:

Age comments.

Comments on the age estimate, typically provides context for the age. Textual values of no more than 90 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 2806 records have no value for karcomm.

Attribute:

Attribute_Label: karsampcom

Attribute_Definition:

Sample comments.

Comments on the sample analyzed. Textual values of no more than 162 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 11619 records have no value for karsampcom.

Attribute:

Attribute_Label: karanalcom

Attribute_Definition:

Analytical comments.

Comments on the analytic method used. Textual values of no more than 255 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 7491 records have no value for karanalcom.

Attribute:

Attribute_Label: karothrcom

Attribute_Definition:

Other comments.

Other comments pertinent to this analysis. Textual values of no more than 373 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 10041 records have no value for karothrcom.

Detailed_Description:

Entity_Type:

Entity_Type_Label: Rb_Sr

Entity_Type_Definition:

Rubidium-Strontium radiometric dating results, observations, and parameters

Attribute:

Attribute_Label: recno

Attribute_Definition:

Record ID.

Sample identifier, a value of main:recno. Integer values. Int of width 5.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 18669

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: rbsrrecno

Attribute_Definition:

Analysis ID.

Sequence number, for this sample, of this analysis. Integer values. Int of width 5.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 24

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: rbsrage

Attribute_Definition:

Calculated age.

Age estimate in millions of years. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 991 records have no value for rbsrage.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.71

Range_Domain_Maximum: 7394.61

Attribute:

Attribute_Label: rbsrerr

Attribute_Definition:

Age uncertainty.

Uncertainty of the age estimate attributable to the analytical method, in millions of years. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 2299 records have no value for rbsrerr.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.1

Range_Domain_Maximum: 560

Attribute:

Attribute_Label: 87_86init

Attribute_Definition:

Initial 87Sr/86Sr.

Initial ratio of 87Sr to 86Sr in the sampled material. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 1688 records have no value for 87_86init.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.1037

Range_Domain_Maximum: 124.2

Attribute:

Attribute_Label: rbsrmin

Attribute_Definition:

Rock or mineral analyzed.

Rock or mineral analyzed. Textual values of no more than 46 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 26 records have no value for rbsrmin.

Attribute:

Attribute_Label: rbsranltyp

Attribute_Definition:

Type of analysis.

Specific type of analytic method used. Textual values of no more than 49 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 923 records have no value for rbsranltyp.

Attribute:

Attribute_Label: rbsrlabno

Attribute_Definition:

Analysis ID.

Identifier for this analysis assigned by the laboratory. Textual values of no more than 23 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 5 records have no value for rbsrlabno.

Attribute:

Attribute_Label: rbsrdeccon

Attribute_Definition:

Decay constants.

Radioactive decay constants used in calculations. Textual values of no more than 21 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 35 records have no value for rbsrdeccon.

Attribute:

Attribute_Label: rb_ppm

Attribute_Definition:

Rubidium concentration.

Rubidium concentration in parts per million by weight. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 444 records have no value for rb_ppm.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 164165

Attribute:

Attribute_Label: sr_ppm

Attribute_Definition:

Strontium concentration.

Strontium concentration in parts per million by weight. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 1093 records have no value for sr_ppm.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.1

Range_Domain_Maximum: 21210

Attribute:

Attribute_Label: 87srrad

Attribute_Definition:

Radiogenic 87Sr.

Radiogenic 87Sr. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 6420 records have no value for 87srrad.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.01

Range_Domain_Maximum: 176

Attribute:

Attribute_Label: 87rb_86sr

Attribute_Definition:

Ratio 87Rb/86Sr.

Ratio of 87Rb to 86Sr counted by mass spectrometry. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 1265 records have no value for 87rb_86sr.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 62166

Attribute:

Attribute_Label: 87sr_86sr

Attribute_Definition:

Ratio 87Sr/86Sr.

Ratio of 87Sr to 86Sr counted by mass spectrometry. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 689 records have no value for 87sr_86sr.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.043

Range_Domain_Maximum: 70758

Attribute:

Attribute_Label: norm

Attribute_Definition:

Normal?.

T or N or empty; meaning of this field is not clear. Textual values of no more than 1 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 1058 records have no value for norm.

Attribute:

Attribute_Label: sampsuit

Attribute_Definition:

Sample suite number.

Group identifier of related samples. Integer values. Int of width 5.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 14168 records have no value for sampsuit.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 7

Range_Domain_Maximum: 641

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: addref

Attribute_Definition:

Bibliographic references.

Additional bibliographic reference information for this analysis. Textual values of no more than 51 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 1391 records have no value for addref.

Attribute:

Attribute_Label: rbsragecom

Attribute_Definition:

Age comments.

Comments on the age estimate, typically provides context for the age. Textual values of no more than 87 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 2721 records have no value for rbsragecom.

Attribute:

Attribute_Label: rbsrsamcom

Attribute_Definition:

Sample comments.

Comments on the sample analyzed. Textual values of no more than 104 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 6498 records have no value for rbsrsamcom.

Attribute:

Attribute_Label: rbsranlcom

Attribute_Definition:

Analytical comments.

Comments on the analytic method used. Textual values of no more than 227 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 1543 records have no value for rbsranlcom.

Attribute:

Attribute_Label: rbsrothcom

Attribute_Definition:

Other comments.

Other comments pertinent to this analysis. Textual values of no more than 211 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 4255 records have no value for rbsrothcom.

Detailed_Description:

Entity_Type:

Entity_Type_Label: Sm_Nd

Entity_Type_Definition:

Samarium-Neodymium radiometric dating results, observations, and parameters

Attribute:

Attribute_Label: recno

Attribute_Definition:

Record ID.

Sample identifier, a value of main:recno. Integer values. Int of width 5.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 18669

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: smndrecno

Attribute_Definition:

Analysis ID.

Sequence number, for this sample, of this analysis. Integer values. Int of width 5.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 3

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: smndage

Attribute_Definition:

Calculated age.

Age estimate in millions of years. Integer values. Int of width 5.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 1 records have no value for smndage.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 178

Range_Domain_Maximum: 575

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: smnderr

Attribute_Definition:

Age uncertainty.

Uncertainty of the age estimate attributable to the analytical method, in millions of years. Integer values. Int of width 5.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 2 records have no value for smnderr.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 21

Range_Domain_Maximum: 75

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: smndmin

Attribute_Definition:

Rock or mineral analyzed.

Rock or mineral analyzed. Textual values of no more than 21 characters.

Attribute:

Attribute_Label: smndlabno

Attribute_Definition:

Analysis ID.

Identifier for this analysis assigned by the laboratory. Textual values of no more than 8 characters.

Attribute:

Attribute_Label: smnddeccon

Attribute_Definition:

Decay constants.

Radioactive decay constants used in calculations. Real numbers stored in double precision.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.00000654

Range_Domain_Maximum: 0.00000654

Attribute:

Attribute_Label: sm_ppm

Attribute_Definition:

Samarium concentration.

Samarium concentration in parts per million by weight. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 27 records have no value for sm_ppm.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.88

Range_Domain_Maximum: 14.81

Attribute:

Attribute_Label: nd_ppm

Attribute_Definition:

Neodymium concentration.

Neodymium concentration in parts per million by weight. Real numbers stored in double precision.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.15

Range_Domain_Maximum: 50.46

Attribute:

Attribute_Label: 143smrad

Attribute_Definition:

Ratio 147Sm/144Nd.

Ratio of counts of 147Sm to 144Nd in the sample, measured by mass spectrometry. Real numbers stored in double precision.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.1074

Range_Domain_Maximum: 0.3809

Attribute:

Attribute_Label: 143ndrat

Attribute_Definition:

Ratio 143Nd/144Nd.

Ratio of counts of 143Nd to 144Nd in the sample, measured by mass spectrometry. Real numbers stored in double precision.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.51079

Range_Domain_Maximum: 0.513212

Attribute:

Attribute_Label: smndagecom

Attribute_Definition:

Age comments.

Comments on the age estimate, typically provides context for the age. Textual values of no more than 40 characters.

Attribute:

Attribute_Label: smndothcom

Attribute_Definition:

Other comments.

Other comments pertinent to this analysis. Textual values of no more than 80 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 32 records have no value for smndothcom.

Detailed_Description:

Entity_Type:

Entity_Type_Label: U_Th_Pb

Entity_Type_Definition:

Radiometric age estimates, observations, and parameters using techniques involving isotopes of uranium, thorium, and lead.

Attribute:

Attribute_Label: recno

Attribute_Definition:

Record ID.

Sample identifier, a value of main:recno. Integer values. Int of width 5.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 18669

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: upbrecno

Attribute_Definition:

Analysis ID.

Sequence number, for this sample, of this analysis. Integer values. Int of width 5.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 1 records have no value for upbrecno.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 33

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: 206_238age

Attribute_Definition:

Age 206Pb/238U.

Age estimate in millions of years using the 206Pb-238U method. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 575 records have no value for 206_238age.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.1

Range_Domain_Maximum: 16300

Attribute:

Attribute_Label: err206_238

Attribute_Definition:

Age uncertainty 206Pb/238U.

Uncertainty of the age estimate by the 206Pb-238U method attributable to the analytical method, in millions of years. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 2194 records have no value for err206_238.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 1285

Attribute:

Attribute_Label: 207_235age

Attribute_Definition:

Age 207Pb/235U.

Age estimate in millions of years using the 207Pb-235U method. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 611 records have no value for 207_235age.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -26.6

Range_Domain_Maximum: 4460

Attribute:

Attribute_Label: err207_235

Attribute_Definition:

Age uncertainty 207Pb/235U.

Uncertainty of the age estimate by the 207Pb-235U method attributable to the analytical method, in millions of years. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 2186 records have no value for err207_235.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -350

Range_Domain_Maximum: 2127

Attribute:

Attribute_Label: 207_206age

Attribute_Definition:

Age 207Pb/206Pb.

Age estimate in millions of years using the 207Pb-206Pb method. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 12 records have no value for 207_206age.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -50000

Range_Domain_Maximum: 4792.4

Attribute:

Attribute_Label: err207_206

Attribute_Definition:

Age uncertainty 207Pb/206Pb.

Uncertainty of the age estimate by the 207Pb-206Pb method attributable to the analytical method, in millions of years. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 2058 records have no value for err207_206.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 320

Attribute:

Attribute_Label: 208_232age

Attribute_Definition:

Age 208Pb/232Th.

Age estimate in millions of years using the 208Pb-232Th method. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 1994 records have no value for 208_232age.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 24.5

Range_Domain_Maximum: 13383

Attribute:

Attribute_Label: err208_232

Attribute_Definition:

Age uncertainty 208Pb/232Th.

Uncertainty of the age estimate by the 208Pb-232Th method attributable to the analytical method, in millions of years. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 2421 records have no value for err208_232.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.8

Range_Domain_Maximum: 210

Attribute:

Attribute_Label: uintcpt

Attribute_Definition:

Upper intercept.

Upper intercept of the Concordia diagram. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 1267 records have no value for uintcpt.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 14.9

Range_Domain_Maximum: 3900

Attribute:

Attribute_Label: erruintcpt

Attribute_Definition:

Upper intercept uncertainty.

Uncertainty in the upper intercept. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 1458 records have no value for erruintcpt.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 550

Attribute:

Attribute_Label: lintcpt

Attribute_Definition:

Lower intercept.

Lower intercept of the Concordia diagram. Textual values of no more than 8 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 2172 records have no value for lintcpt.

Attribute:

Attribute_Label: errlintcpt

Attribute_Definition:

Lower intercept uncertainty.

Uncertainty in the lower intercept. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 2243 records have no value for errlintcpt.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.8

Range_Domain_Maximum: 900

Attribute:

Attribute_Label: pbinitrat

Attribute_Definition:

Initial lead isotopic composition.

Initial ratios of lead isotopes in common lead, in sequence: 206Pb/204Pb, 207Pb/204Pb, 208Pb/204Pb. Textual values of no more than 24 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 1253 records have no value for pbinitrat.

Attribute:

Attribute_Label: upbmin

Attribute_Definition:

Rock or mineral analyzed.

Rock or mineral analyzed. Textual values of no more than 52 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 8 records have no value for upbmin.

Attribute:

Attribute_Label: upblabno

Attribute_Definition:

Analysis ID.

Identifier for this analysis assigned by the laboratory. Textual values of no more than 26 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 7 records have no value for upblabno.

Attribute:

Attribute_Label: upbdeccon

Attribute_Definition:

Decay constants.

Radioactive decay constants used in calculations. Textual values of no more than 35 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 5 records have no value for upbdeccon.

Attribute:

Attribute_Label: u_ppm

Attribute_Definition:

Uranium concentration.

Uranium concentration in parts per million by weight. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 409 records have no value for u_ppm.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 791000

Attribute:

Attribute_Label: th_ppm

Attribute_Definition:

Thorium concentration.

Thorium concentration in parts per million by weight. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 1894 records have no value for th_ppm.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.1

Range_Domain_Maximum: 414000

Attribute:

Attribute_Label: pb_ppm

Attribute_Definition:

Lead concentration.

Lead concentration in parts per million by weight. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 431 records have no value for pb_ppm.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.01

Range_Domain_Maximum: 170100

Attribute:

Attribute_Label: 204pb

Attribute_Definition:

Isotopic concentration 204Pb.

Concentration of 204Pb isotope in the sample. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 812 records have no value for 204pb.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 83.62

Attribute:

Attribute_Label: 206pb

Attribute_Definition:

Isotopic concentration 206Pb.

Concentration of 206Pb isotope in the sample. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 786 records have no value for 206pb.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.228

Range_Domain_Maximum: 95.51

Attribute:

Attribute_Label: 207pb

Attribute_Definition:

Isotopic concentration 207Pb.

Concentration of 207Pb isotope in the sample. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 787 records have no value for 207pb.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.1455

Range_Domain_Maximum: 46.02

Attribute:

Attribute_Label: 208pb

Attribute_Definition:

Isotopic concentration 208Pb.

Concentration of 208Pb isotope in the sample. Real numbers stored in double precision.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 787 records have no value for 208pb.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.053

Range_Domain_Maximum: 1889

Attribute:

Attribute_Label: sampsuit

Attribute_Definition:

Sample suite number.

Group identifier of related samples. Integer values. Int of width 5.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 14168 records have no value for sampsuit.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 7

Range_Domain_Maximum: 641

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: addref

Attribute_Definition:

Bibliographic references.

Additional bibliographic reference information for this analysis. Textual values of no more than 25 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 1391 records have no value for addref.

Attribute:

Attribute_Label: upbagecom

Attribute_Definition:

Age comments.

Comments on the age estimate, typically provides context for the age. Textual values of no more than 84 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 1661 records have no value for upbagecom.

Attribute:

Attribute_Label: upbsampcom

Attribute_Definition:

Sample comments.

Comments on the sample analyzed. Textual values of no more than 224 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 699 records have no value for upbsampcom.

Attribute:

Attribute_Label: upbanalcom

Attribute_Definition:

Analytical comments.

Comments on the analytic method used. Textual values of no more than 199 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 1294 records have no value for upbanalcom.

Attribute:

Attribute_Label: upbothrcom

Attribute_Definition:

Other comments.

Other comments pertinent to this analysis. Textual values of no more than 255 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 757 records have no value for upbothrcom.

Detailed_Description:

Entity_Type:

Entity_Type_Label: datadxny

Entity_Type_Definition: Data dictionary, explaining tables and fields

Attribute:

Attribute_Label: id

Attribute_Definition:

Row ID.

Row identifier within datadxny table. Integer values. Int of width 0.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 149

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: tblorder

Attribute_Definition:

Table order.

Order in which this table should appear in some presentations. Integer values. Int of width 0.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 7

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: tblname

Attribute_Definition:

Table name.

Name of the table. Textual values of no more than 20 characters.

Attribute:

Attribute_Label: number

Attribute_Definition:

Field order.

Order in which this field occurs in the RDBMS. Integer values. Int of width 0.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 7 records have no value for number.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 31

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: label

Attribute_Definition:

Field label.

Label of the field in the RDBMS. Textual values of no more than 32 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 7 records have no value for label.

Attribute:

Attribute_Label: category

Attribute_Definition:

Category.

General category of information provided by the contents of the field. Textual values of no more than 50 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 7 records have no value for category.

Attribute:

Attribute_Label: short_desc

Attribute_Definition:

Short description.

Descriptive name of the field used in some presentations, not constrained by rules affecting the label. Textual values of no more than 40 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 7 records have no value for short_desc.

Attribute:

Attribute_Label: description

Attribute_Definition:

Description.

Longer description of the purpose and contents of the field. Textual values of no more than 4096 characters.

Attribute:

Attribute_Label: link

Attribute_Definition:

Link.

URL providing more information about the field. Textual values of no more than 96 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 149 records have no value for link.

Attribute:

Attribute_Label: origin

Attribute_Definition:

Origin.

Abbreviation of an organization, data set, or other entity responsible for defining the field. Textual values of no more than 12 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 149 records have no value for origin.

Attribute:

Attribute_Label: sqltype

Attribute_Definition:

SQL data type.

Data type of the field as used in the RDBMS. Textual values of no more than 8 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 7 records have no value for sqltype.

Attribute:

Attribute_Label: dbftype

Attribute_Definition:

DBF field type.

Data type of the field when expressed in DBF. Textual values of no more than 1 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 7 records have no value for dbftype.

Attribute:

Attribute_Label: width

Attribute_Definition:

DBF field width.

Field width when expressed in DBF. Integer values. Int of width 0.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 7 records have no value for width.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 4096

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: prec

Attribute_Definition:

DBF field precision.

Precision of the field (places to right of decimal) when expressed in DBF, only for numeric fields. Integer values. Int of width 0.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 76 records have no value for prec.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 6

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: units

Attribute_Definition:

Units.

Units of measure of the field values. Textual values of no more than 64 characters.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: (no value)

Enumerated_Domain_Value_Definition:

Information not available for this record. 149 records have no value for units.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Peter N Schweitzer

Contact_Organization: USGS ER GD

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing address

Address: 12201 Sunrise Valley Drive

City: Reston

State_or_Province: VA

Postal_Code: 20192-0002

Country: USA

Contact_Voice_Telephone: 703-648-6533

Contact_Facsimile_Telephone: 703-648-6252

Contact_Electronic_Mail_Address: pschweitzer@usgs.gov

Resource_Description: USGS Open-File Report 2003-236

Distribution_Liability:

This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey (USGS) editorial standards or with the North American Stratigraphic Code. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: WMS

Format_Version_Number: 1.1.1

Format_Information_Content: Sample characteristics and geologic age information

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

<http://mrdata.usgs.gov/services/geochron?request=GetCapabilities&service=WMS&version=1.1.1>

Digital_Form:

Digital_Transfer_Information:

Format_Name: WFS

Format_Version_Number: 1.0.0

Format_Information_Content: Sample characteristics and geologic age analyses

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

<http://mrdata.usgs.gov/services/geochron?request=GetCapabilities&service=WFS&version=1.0.0>

Digital_Form:

Digital_Transfer_Information:

Format_Name: Shapefile

Format_Version_Number: 1.0

Format_Information_Content: Sample characteristics and geologic age information

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <http://mrdata.usgs.gov/geochron/geochron.zip>

Digital_Form:

Digital_Transfer_Information:

Format_Name: Comma-delimited text

Format_Information_Content: Sample characteristics and geologic age information

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <http://mrdata.usgs.gov/geochron/geochron-csv.zip>

Fees: none

Metadata_Reference_Information:

Metadata_Date: 20111221

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Schweitzer, Peter, N

Contact_Organization: Eastern Mineral Resources Team

Contact_Address:

Address_Type: mailing address

Address: 12201 Sunrise Valley Drive Mail Stop 954

City: Reston

State_or_Province: VA

Postal_Code: 20192

Country: USA

Contact_Voice_Telephone: 703-648-6533

Contact_Electronic_Mail_Address: pschweitzer@usgs.gov