USGS Geoscience Data Catalog
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Yerkes, R. F. , and Campbell, R. H. , 1995, Preliminary geologic map of the Newhall 7.5' quadrangle, southern California: A digital database: U.S. Geological Survey Open-File Report 95-800.Online Links:
This is a vector data set. It contains the following vector data types (SDTS terminology):
Planar coordinates are encoded using coordinate pair
Planar coordinates are specified in meters
Value | Definition |
---|---|
contact, approx. located | Contact whose position is not precisely located |
contact, certain | Observed geologic contact |
fault, approx. located | Fault whose position is not precisely known |
fault, concealed | Concealed fault whose position is inferred |
fault, inferred | Fault whose position is inferred |
map boundary, certain | Boundary of mapped area |
Value | Definition |
---|---|
f.a., anticline, approx. located | Anticlinal fold axis whose position is not precisely known |
f.a., anticline, concealed | Anticlinal fold axis whose position is concealed and inferred |
f.a., syncline, approx. located | Synclinal fold axis whose position is not precisely known |
f.a., syncline, concealed | Concealed synclinal fold axis whose position is inferred |
Value | Definition |
---|---|
bedding | Bedding orientation |
flat bedding | Bedding whose dip is 0 degrees |
Range of values | |
---|---|
Minimum: | 0 |
Maximum: | 86 |
Units: | degrees |
Resolution: | 1 |
Range of values | |
---|---|
Minimum: | 0 |
Maximum: | 359 |
Units: | degrees |
Resolution: | 1 |
R. H. Campbell, Reston, VA assisted in field interpretations and compilation; P. K. Showalter and C. M. Wentworth supplied critical custom programming; and S. E. Graham updated supporting files for completeness and consistency and prepared this report.
650-329-4946 (voice)
ryerkes@usgs.gov
To provide to the public a digital geologic map database of the Newhall 7.5' quadrangle, southern California.
Yerkes, R.F., and Campbell, R.H., 1995, Preliminary geologic map of the Newhall 7.5' quadrangle, southern California: U.S. Geological Survey Open-File Report 95-503.
Yerkes, R.F., and Showalter, P.K., 1990, Exploratory wells drilled in the Los Angeles, California 1:100,000 quadrangle, southern California: U.S. Geological Survey Open-File Report 90-627.
Complete
This digital map database is compiled from previously published sources combined with some new mapping and modifications in nomenclature. The geologic map database delineates map units that are identified by general age and lithology following the stratigraphic nomenclature of the U. S. Geological Survey. For detailed descriptions of the units, their stratigraphic relations and sources of geologic mapping consult Yerkes and Campbell (1995).
Are there legal restrictions on access or use of the data?
- Access_Constraints: none
- Use_Constraints: none
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US Geological Survey Open-File Report 95-800
This report is preliminary and has not been reviewed for conformity with U. S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U. S. Government.
This database, identified as "Preliminary Geologic Map of the Newhall 7.5' Quadrangle, southern California: A Digital Database," has been approved for release and publication by the Director of the USGS. Although this database has been reviewed and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. This database is released on condition that neither the USGS nor the U. S. Government may be held liable for any damages resulting from its use.
Data format: |
ARC/INFO export files Description of coverage nh-geol.e00 Depositional contacts, faults, and unit labels nh-strc.e00 Strike and dip information, fold axes nh-wells.e00 Exploratory oil wells nh-topo.e00 Topographic base map taken from a scan of a composite negative of the Newhall 7.5 minute quadrangle (contour interval = 25 ft.)in format ArcInfo export (version 7.x) Size: 18.3 megabytes |
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Network links: |
<http://pubs.usgs.gov/of/1995/of95-800/newhal.tar.gz> |
A compressed tar file of the geologic map database and related files can be obtained by sending a tape with request and return address to:
Newhall, CA 7.5' Geologic Database c/o Database Coordinator US Geological Survey 345 Middlefield Road, M/S 975 Menlo Park, CA 94025Do not omit any part of this address!
The compressed tar file will be returned on the tape. The acceptable tape types are: 1/4 inch, 150 MB cartridge tape, 2.3 or 5.0 GB, 8 mm Exabyte tape.
703-648-6974 (voice)
703-648-6560 (FAX)
pschweitzer@usgs.gov