1. Mineral Resources
  2. Online Spatial Data

Geology, geochemistry, geophysics, mineral occurrences, and mineral resource assessment for the commonwealth of Puerto Rico

Metadata also available as - [Outline] - [Parseable text] - [XML]

Frequently anticipated questions:

What does this data set describe?

Title:
Geology, geochemistry, geophysics, mineral occurrences, and mineral resource assessment for the commonwealth of Puerto Rico
Abstract:
Geologic map with faults, along with additional scientific information needed for mineral resource assessment (geochemical analyses, mineral occurrences, geologic terranes, and estimated undiscovered resources)
  1. How might this data set be cited?
    Bawiec, Walter J., 1998, Geology, geochemistry, geophysics, mineral occurrences, and mineral resource assessment for the commonwealth of Puerto Rico: Open-File Report 98-38, U.S. Geological Survey, Reston, Virginia.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -67.27198
    East_Bounding_Coordinate: -65.575757
    North_Bounding_Coordinate: 18.518156
    South_Bounding_Coordinate: 17.928237
  3. What does it look like?
    https://mrdata.usgs.gov/catalog/images/OFR_98-38.png (PNG)
    Reduced-size image of the geologic units and faults, (721 x 273 pixels)
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 1998
    Currentness_Reference:
    The data, compiled over a long period of time, were assembled into the report published in 1998. The data were repackaged to facilitate web access in 2010.
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • G-Polygon (8007)
      • Complete chain (12760)
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.00001. Longitudes are given to the nearest 0.00001. Latitude and longitude values are specified in decimal degrees. The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.
  7. How does the data set describe geographic features?
    PR_Fault.dbf
    Thrust faults (Source: this report)
    LNTYPE
    Type of fault (Source: this report)
    ValueDefinition
    7Thrust fault
    27Concealed fault
    PR_Fault_N.dbf
    Normal faults (Source: this report)
    LNTYPE
    Type of geologic fault (Source: this report)
    ValueDefinition
    0(unknown)
    25Normal fault
    PR_Geology.dbf
    Geologic units (Source: this report)
    FMATN
    Geologic formation symbol. Initial capital letter indicates age: K = Cretaceous; T = Tertiary; Q = Quaternary (Source: this report) Identifier indicating age and abbreviated unit name
    COLR
    Color index in shadeset (Source: this report)
    Range of values
    Minimum:0
    Maximum:3
    COLR2
    Color index in shadeset (Source: this report)
    Range of values
    Minimum:0
    Maximum:255
    SHADE
    Color index in shadeset (Source: this report)
    Range of values
    Minimum:0
    Maximum:24
    PROV
    Province identifier code number (Source: this report)
    Range of values
    Minimum:0
    Maximum:183
    PR_Gravity.dbf
    Bouguer gravity anomaly (Source: this report)
    COLR2
    Color index from shadeset (Source: this report)
    Range of values
    Minimum:46
    Maximum:176
    PR_Magnetic.dbf
    Contour intervals of magnetic anomaly (Source: this report)
    NVALUE
    Magnetic anomaly (Source: this report)
    Range of values
    Minimum:-350
    Maximum:2950
    Units:nano Tesla
    COLR2
    Color index from shadeset (Source: this report)
    Range of values
    Minimum:57
    Maximum:189
    PR_terrane.dbf
    Geologic terranes (Source: this report)
    PROV
    Province indicator (Source: this report)
    Range of values
    Minimum:0
    Maximum:183
    prunit.txt
    Detailed information about the geologic units (Source: this report)
    symbol
    Map symbol for the formation, a value of PR_Geology:fmatn (Source: this report) Identifier indicating age and abbreviated unit name
    name
    Name of the formation or rock unit (Source: this report) literal text without significant abbreviation
    age
    General age of the formation or rock unit, expressed as chronostratigraphic unit names (Source: this report) literal text without significant abbreviation
    descript
    Description of the formation or rock unit, drawn from the printed report (Source: this report) literal text without significant abbreviation
    ref
    Bibliographic references used to map and document the formation or rock unit; abbreviated form commonly found in scientific reports should match references given in bib.txt (Source: this report) literal text without significant abbreviation

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Bawiec, Walter J.
  2. Who also contributed to the data set?
    Tom Kress and Peter Schweitzer repackaged the data to facilitate web access in 2010.
  3. To whom should users address questions about the data?
    Thomas H Kress
    USGS -- GD
    12201 Sunrise Valley Drive
    Mail Stop 954
    Reston, VA
    USA

    703-648-6328 (voice)
    703-648-6383 (FAX)
    thkress@usgs.gov

Why was the data set created?

This publication attempts to apply much of the geologic, geochemical, geophysical, and mineral occurrence information to a single objective focused on producing a mineral resource assessment for the Commonwealth of Puerto Rico. However, the value of this publication lies not within the results of the mineral resource assessment nor within the interactive PDF files which can be viewed on the screen, but within the geologic, geochemical, geophysical, and mineral occurrence digital map coverages and databases which can be used for their own unique applications.

How was the data set created?

  1. From what previous works were the data drawn?
    USGS OFR 98-38 (source 1 of 1)
    Bawiec, Walter J. (editor), 1998, Geology, Geochemistry, Geophysics, Mineral Occurrences and Mineral Resource Assessment for the Commonwealth of Puerto Rico: U.S. Geological Survey Open-File Report 98-38, U.S. Geological Survey, Reston, VA.

    Online Links:

    Type_of_Source_Media: Digital data
    Source_Scale_Denominator: 100000
    Source_Contribution:
    Geologic map units, faults, magnetic anomaly contours, gravity anomaly contours.
  2. How were the data generated, processed, and modified?
    Date: 2010 (process 1 of 2)
    Conversion to PostgreSQL with PostGIS geometry of the ArcInfo interchange files for geologic units, faults, terranes, gravity, and magnetic anomaly contours, along with map quadrangle boundaries. Addition of a column to the geologic unit table to hold a controlled term for generalized lithology from LithClass 6.2, using information provided in the description of map units as a guide. Map quadrangle boundaries and municipio (county-level administrative units) boundaries were obtained from other sources. Change of coordinate system of original data from geographic NAD27 to geographic WGS84 by PostGIS version 2.0 and Proj.4. Person who carried out this activity:
    Peter N Schweitzer
    USGS Geology, Energy, and Minerals Science Center
    Geologist
    Mail Stop 954
    12201 Sunrise Valley Dr
    Reston, VA
    USA

    703-648-6533 (voice)
    703-648-6252 (FAX)
    pschweitzer@usgs.gov
    Data sources used in this process:
    • USGS OFR 98-38
    Data sources produced in this process:
    Date: 19-Jan-2021 (process 2 of 2)
    Metadata updated to include data quality information and URLs in current forms. Person who carried out this activity:
    Peter N Schweitzer
    USGS Geology, Energy, and Minerals Science Center
    Geologist
    Mail Stop 954
    12201 Sunrise Valley Dr
    Reston, VA
    USA

    703-648-6533 (voice)
    703-648-6252 (FAX)
    pschweitzer@usgs.gov
  3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    The published report includes data layers that are not included in this compilation, but remain available from the USGS publications web site: metallic and nonmetallic mineral resource records from MRDS; location of placer, gold, and skarn deposits, gravity contours and station locations; stream-sediment geochemical analyses; geology of Isla de Mona and Isla de Vieques; and shaded relief.
  5. How consistent are the relationships among the observations, including topology?
    The publication provides the geologic map units and faults in separate ArcInfo coverages for the eastern, central, and western parts of the island. These were combined in this compilation. Process contact does not remember, in 2021, the source used to obtain the 1:20,000 scale map quadrangle boundaries.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: none
Use_Constraints: none
  1. Who distributes the data set? (Distributor 1 of 1)
    Peter N Schweitzer
    USGS Geology, Energy, and Minerals Science Center
    Geologist
    12201 Sunrise Valley Drive
    Reston, VA
    USA

    703-648-6533 (voice)
    703-648-6252 (FAX)
    pschweitzer@usgs.gov
  2. What's the catalog number I need to order this data set? USGS Open-File Report 98-38
  3. What legal disclaimers am I supposed to read?
    Although these data have been processed successfully on computers at the USGS, no warranty, expressed or implied, is made by the USGS regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 19-Jan-2021
Metadata author:
Peter N Schweitzer
USGS Geology, Energy, and Minerals Science Center
Geologist
12201 Sunrise Valley Drive
Reston, VA
USA

703-648-6533 (voice)
703-648-6252 (FAX)
pschweitzer@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://mrdata.usgs.gov/metadata/ofr-98-38.faq.html>
Generated by mp version 2.9.50 on Tue Jan 19 09:49:27 2021