Online Links:
This is a Vector data set. It contains the following vector data types (SDTS terminology):
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.0197137099. Longitudes are given to the nearest 0.0291450447. Latitude and longitude values are specified in Decimal seconds.
The horizontal datum used is D_WGS_1984.
The ellipsoid used is WGS_1984.
The semi-major axis of the ellipsoid used is 6378137.0.
The flattening of the ellipsoid used is 1/298.257223563.
Generally recognized geographic regions in the U.S.A. used to designate areas for study of basement characteristics. Designation of areas based both on available data and characteristics of underlying basement.
Unique name for each identified basement domain.
Alternate name used for an identified basement domain in some published sources.
Generally accepted tectonic settings are identified as responsible for the types of crust. Descriptions for tectonic settings and types of crust are presented in text.
Ages are presented for domains where specific dates represent formation events. Age ranges are presented where dating demonstrates a span of formation events. Geologic ages are presented where the time of formation is more generalized.
Descriptions for the geometry and style of accretion for individual basement domains onto previously formed or amalgamated basement are presented in text.
Ages are presented for crustal growth where single dates represent specific events. Age ranges are presented where dating demonstrates a span of crustal growth events. Geologic ages are presented where the time of crustal growth is more generalized.
Abbreviated citation of reference material used to support interpretion of basement domains. Full citations are provided in the accompanying report.
Information presented on relations between domains, questions about unknown aspects of basement origin or development, and vergence of structures.
| Range of values | |
|---|---|
| Minimum: | 3.69266066502714 |
| Maximum: | 91.8042965588683 |
| Range of values | |
|---|---|
| Minimum: | 0.21600782940954 |
| Maximum: | 131.073760220578 |
Spatial data supporting the Basement tectonic framework of the U.S. Project were developed by the U.S. Geological Survey Mineral Resources Program (MRP).
This map of basement domains of the conterminous U.S. and Alaska is intended for use as a base layer for national-scale mineral resource assessments. The compositions, architecture, and original metals endowments are potentially important to assessments of primary mineral deposits and to the residence and recycling of metals in the crust of the U.S. parts of the North American continent. The database can be used to demonstrate the construction of the U.S. through time, to identify specific types of crust, and to identify domains potentially containing metal endowments of specific genetic types or endowed with specific metals.
The accuracy of attribute values varies by field. Values within descriptive fields represent new terminology developed by the report authors (for example, Crust_Type), or are modified from published geologic maps and reports (for example, Crust_Formation_Age) and therefore dependent on the accuracy of the source.
The positional accuracy of basement domain boundaries is dependent on the source, scale, and accuracy of the base materials. In general, positional accuracy is approximate, highly variable, and not accurate at scales larger than 1:5,000,000.
Not applicable.
Dataset coverage includes the continental U.S. and Alaska.
Polygons in this dataset were checked for topological consistency (polygonal gaps and overlaps were corrected). Attribute fields containing dates were visually inspected for logical consistency (e.g. the age of crustal formation was greater than the age of crustal accretion).
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints:
- These data are intended for use at 1:5,000,000 scale. Data have been checked to ensure the accuracy. If any errors are detected, please notify the originating office. The U.S. Geological Survey strongly recommends that careful attention be paid to the metadata file associated with these data. Acknowledgement of the U.S. Geological Survey would be appreciated in products derived from these data. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ArcGIS format, this metadata file may include some ArcGIS-specific terminology.
Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this information product, for the most part, is in the public domain, it also contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner. This database, identified as DS 898, has been approved for release and publication by the U.S. Geological Survey (USGS). Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the U.S. Government may be held liable for any damages resulting from its authorized or unauthorized use. Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The USGS shall not be held liable for improper or incorrect use of the data described and/or contained herein.
| Data format: | Vector Digital Data Set (Polygon) (version 10.1) |
|---|---|
| Network links: |
http://dx.doi.org/10.3133/ds898 |