Metadata: Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 1997 Title: Generalized thermal maturity map of Alaska Geospatial_Data_Presentation_Form: map Publication_Information: Publication_Place: Anchorage, AK Publisher: U.S. Geological Survey Online_Linkage: http://agdc.usgs.gov/data/usgs/geology/ Larger_Work_Citation: Citation_Information: Originator: Johnsson, M.J. (ed.) Originator: Howell, D.G. (ed.) Publication_Date: 1996 Title: Thermal evolution of sedimentary basins in Alaska Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: B-2142 Description: Abstract: This dataset consists of a polygon coverage and associated attribute data derived from the onshore portion of the 1996 "Generalized Thermal Maturity Map of Alaska" compiled by M.J. Johnsson and D.G. Howell, which was published as Plate 1 in US Geological Survey Bulletin 2142: "Thermal Evolution of Sedimentary Basins in Alaska". The published map summarizes vitrinite reflectance and conodont alteration index data (both measure the thermal maturity of rocks) into generalized units that can be shown cartographically at 1:2,500,000. This digital dataset includes the 8 map units indicated on the original map. (5 thermal maturity levels; 2 rock or sediment type; 1 "no data"). The data quality of the generalized information is retained, with an attribute value for "certainty" whose value choices are "questioned" or "certain". Additional data retained in a look-up table are the maximum and minimum vitrinite reflectance and conodont alteration index values assigned to each thermal maturity level. This coverage is not intended to be a complete representation of the printed map. It does NOT include the following features: locations of individual vitrinite or conodont sample data points (these data are available in: Johnsson and others, 1992, USGS Open File Report 409, 3 diskettes); faults; offshore maturity data (from dredge and well samples); cities, glaciers, wells; inset maps and subsurface contours for the Colville basin and Cook Inlet; the correlation chart, text or references printed on the map. Purpose: This coverage is intended to provide digital features (polygons) representing generalized thermal maturity units in Alaska for use in small-scale spatial analysis (statewide) with similar coverages such as geologic units,vegetation types, soils, etc. Johnsson, M.J., Pawlewica, M.J., Harris, A.G., and Valin, Z.C., 1992, Vitrinite reflectance and conodont color alteration index data from Alaska: Data to accompany the Thermal Maturity Map of Alaska: U.S. Geological Survey Open File Report 92-409, 3 Macintosh-formatted 3 1/2" high density (1.44 Mb) diskettes. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1997 Currentness_Reference: Publication date = 1996 Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -176.0 East_Bounding_Coordinate: -130.0 North_Bounding_Coordinate: 72.0 South_Bounding_Coordinate: 51.0 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Geology Theme_Keyword: Thermal Theme_Keyword: Maturity Theme_Keyword: Temperature Theme_Keyword: Vitrinite Theme_Keyword: Conodont Place: Place_Keyword_Thesaurus: None Place_Keyword: Alaska Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: None Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: None Access_Constraints: none Use_Constraints: This coverage should not be copied or distributed without its associated metadata file. Intended use is at small scales (e.g. statewide, 1:2,500,000 etc.) only; enlargements of this data to scales greater than that at which they were originally compiled can lead to misinterpretation of data. The U.S. Geological Survey (Dept. of Interior) should be acknowledged as the data source in products derived from these data. Use of these data is not restricted; however, organizations, agencies, units of government or other users are responsible for its appropriate application. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Alaska Section, Mineral Resource Surveys Program, Geologic Division Contact_Position: GIS Support Staff Contact_Address: Address_Type: mailing and physical address Address: 4200 University Dr. City: Anchorage State_or_Province: AK Postal_Code: 99508-4667 Contact_Voice_Telephone: (907)-786-7495 Browse_Graphic: Browse_Graphic_File_Name: http://agdc.usgs.gov/data/usgs/geology/images/maturity.gif Browse_Graphic_File_Description: Reduced-size image of the entire map extent, 712x563 pixels, 18k bytes. Browse_Graphic_File_Type: GIF Data_Set_Credit: D. C. Pray, J. M. Schmidt Native_Data_Set_Environment: SunOS, 5.5.1, sun4u UNIX, ARC/INFO version 7.1.2 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The completeness and quality of the generalized maturity data in the digital coverage is that of the published 1996 map, which itself summarized data released in 1992 and collected prior to that date (mainly since 1980). No recent data have been added. The geographic accuracy of the published map has been slightly degraded by the rubber-sheet operation. Completeness_Report: The following map features are not included in the digital representation: Offshore data, faults, glaciers,subsurface contours, cities, wells, inset maps, correlation chart, text and references. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 1996 Title: Generalized Thermal Maturity Map of Alaska Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Investigations Series Map Issue_Identification: I-2494 Publication_Information: Publication_Place: Washington, D.C. Publisher: U.S. Government Printing Office Source_Scale_Denominator: 2500000 Type_of_Source_Media: Paper map Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1996 Source_Currentness_Reference: publication date Source_Information: Source_Citation: Citation_Information: Originator: Johnsson, M.J. Originator: Pawlewica, M.J. Originator: Harris, A.G. Originator: Valin, Z.C. Publication_Date: 1992 Title: Vitrinite reflectance and conodont color alteration index data from Alaska: Data to accompany the Thermal Maturity Map of Alaska Series_Information: Series_Name: U.S. Geological Survey Open File Report Issue_Identification: 92-409 Source_Scale_Denominator: 2500000 Type_of_Source_Media: floppy disk Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1992 Source_Currentness_Reference: publication date Process_Step: Process_Description: The linework was digitized in 1997 from a paper copy of the 1996 map at the U.S. Geological Survey's Alaska Section (Geologic Division) facilities in Anchorge, AK. The original Transverse Mercator projection of the map (Central Meridian: 100*W; Scale factor: 0.926; Reference ellipsoid:(6371204m, 63712004m)) was converted to an Albersequal-area coverage in ARC/INFO (version 7.1.2). The resulting coverage did not align exactly with an Albers equal-area coverage of the Alaskan coastline, so a rubber-sheeting operation was performed using points along the coastline and major rivers to match an Albers equal area projection. Map unit (polygon) locations and attributes were checked by the person responsible for the digitizing, and spot-checked by one reviewer reviewer, by comparing a printed copy of the coverage to the published map. Process_Date: 1997 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 1575 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 3453 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 1576 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Albers Conical Equal Area Albers_Conical_Equal_Area: Standard_Parallel: 55 Standard_Parallel: 65 Longitude_of_Central_Meridian: -154 Latitude_of_Projection_Origin: 50 False_Easting: 0.00000 False_Northing: 0.00000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 1.0 Ordinate_Resolution: 1.0 Planar_Distance_Units: meters 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: MATURITY.PAT Entity_Type_Definition: Attribute table of Maturity Attribute: Attribute_Label: MATURITY Attribute_Definition: Thermal-maturity units Attribute_Definition_Source: Generalized Thermal Maturity Map of Alaska, 1996. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: U Enumerated_Domain_Value_Definition: Undermature Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: M1 Enumerated_Domain_Value_Definition: Mature I Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: M2 Enumerated_Domain_Value_Definition: Mature II Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: O Enumerated_Domain_Value_Definition: Overmature Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: S Enumerated_Domain_Value_Definition: Supermature Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Ig-M Enumerated_Domain_Value_Definition: Igneous-Metamorphic Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qs Enumerated_Domain_Value_Definition: Quaternary sediments (unconsolidated) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: ND Enumerated_Domain_Value_Definition: No data Attribute: Attribute_Label: CERTAINTY Attribute_Definition: Confidence of thermal-maturity unit Attribute_Definition_Source: Generalized Thermal Maturity Map of Alaska, 1996. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: C Enumerated_Domain_Value_Definition: Certain Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Q Enumerated_Domain_Value_Definition: Questioned Detailed_Description: Entity_Type: Entity_Type_Label: MATURITY.DAT Entity_Type_Definition: Explanation of thermal-maturity units in terms of vitrinite reflectance and conodont alteration index values used to define them. Entity_Type_Definition_Source: U.S. Geological Survey Bulletin 2142 Attribute: Attribute_Label: MATURITY Attribute_Definition: Thermal-maturity units Attribute_Definition_Source: Generalized Thermal Maturity Map of Alaska, 1996. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: U Enumerated_Domain_Value_Definition: Undermature Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: M1 Enumerated_Domain_Value_Definition: Mature I Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: M2 Enumerated_Domain_Value_Definition: Mature II Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: O Enumerated_Domain_Value_Definition: Overmature Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: S Enumerated_Domain_Value_Definition: Supermature Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Ig-M Enumerated_Domain_Value_Definition: Igneous-Metamorphic Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qs Enumerated_Domain_Value_Definition: Quaternary sediments (unconsolidated) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: ND Enumerated_Domain_Value_Definition: No data Attribute: Attribute_Label: RO-MIN Attribute_Definition: Minimum vitrinite reflectance value occurring in a thermal maturity unit. Attribute_Definition_Source: U.S. Geological Survey Bulletin 2142 Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 5.01 Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: RO-MAX Attribute_Definition: Maximum vitrinite reflectance value occurring in a thermal maturity unit. Attribute_Definition_Source: U.S. Geological Survey Bulletin 2142 Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.01 Range_Domain_Maximum: 8 Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: CAI-MIN Attribute_Definition: Minimum conodont alteration index value occurring in a thermal maturity unit. Attribute_Definition_Source: U.S. Geological Survey Bulletin 2142 Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 5 Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: CAI-MAX Attribute_Definition: Maximum conodont alteration index value occurring in a thermal maturity unit. Attribute_Definition_Source: U.S. Geological Survey Bulletin 2142 Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.1 Range_Domain_Maximum: 8 Attribute_Measurement_Resolution: 0.01 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Geographic Data Committee Contact_Address: Address_Type: mailing and physical Address: 4230 University Drive City: Anchorage State_or_Province: AK Postal_Code: 99508-4664 Contact_Electronic_Mail_Address: agdcweb@usgs.gov Distribution_Liability: Although these data have been processed successfully on a computer system at the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the Geological Survey regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. The U.S. Dept. of Interior, nor any of its agencies are liable for misuse of the data, nor for any damage, transmission of viruses or computer contamination caused through transmission of these data sets. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ArcInfo export Format_Version_Number: 7.x Format_Information_Content: Polygon data with attributes File_Decompression_Technique: gzip -d and tar Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: ftp://agdc.usgs.gov/pub/usgs/geology/maturity.tar.gz Fees: none Metadata_Reference_Information: Metadata_Date: 20030214 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Peter N Schweitzer Contact_Organization: U.S. Geological Survey, ER Contact_Position: Geologist Contact_Address: Address_Type: mailing address Address: Mail Stop 954 12201 Sunrise Valley Drive City: Reston State_or_Province: VA Postal_Code: 20192 Country: USA Contact_Voice_Telephone: 703-648-6533 Contact_Facsimile_Telephone: 703-648-6252 Contact_Electronic_Mail_Address: pschweitzer@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998