USGS Geoscience Data Catalog
Additional USGS Geoscience data can be found by geographic location or by publication series.
Yerkes, R. F., 1997, Preliminary geologic map of the San Fernando 7.5' quadrangle, southern California: A digital database: U.S. Geological Survey Open-File Report 97-163.
This is a vector data set. It contains the following vector data types (SDTS terminology):
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest unknown
Ordinates (y-coordinates) are specified to the nearest unknown
Planar coordinates are specified in meters
|contact, approx. located||Contact whose position is not precisely located|
|contact, inferred||Contact whose position is inferred|
|fault, approx. located||Fault whose position is not precisely known|
|fault, certain||Observed fault|
|fault, concealed||Concealed fault whose position is inferred|
|fault, concealed, queried||Concealed fault whose position is questionable|
|fault, inferred||Fault whose position is inferred|
|fault, inferred, queried||Fault whose positoin is inferred and questionable|
|map boundary, certain||Boundary of mapped area|
|photo lineament||Lineament located through photo observations|
|reverse fault, approx. located||Reverse fault whose position is not precisely known|
|reverse fault, concealed||Concealed reverse fault whose position is inferred|
|s.s. fault, approx. located||Strike-slip fault whose position is not precisely known|
|s.s. fault, r.l., approx. located||Right-lateral strike-slip fault whose position is not precisely known|
|scratch boundary||Location of scratch boundary|
|shoreline, approx. located||Shoreline whose position is not exact|
|thrust fault, approx. located||Thrust fault whose position is not precisely known|
|thrust fault, concealed||Concealed thrust fault whose position is inferred|
|thrust fault, inferred||Thrust fault whose position is inferred|
|f.a., anticline, approx. located||Anticlinal fold axis whose position is not precisely known|
|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|
|ot bedding||Overturned bedding orientation|
|vert foliation and bedding||Bedding and foliation whose dip is 90 degrees|
|Range of values|
|Range of values|
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.
To provide to the public a digital geologic map database of the San Fernando 7.5' quadrangle, southern California
Yerkes, R.F., 1996, Preliminary geologic map of the San Fernando 7.5' quadrangle, southern California: U.S. Geological Survey Open-File Report 96-88.
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.
Person who carried out this activity:
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, sources of geologic mapping, and data on exploratory wells consult Yerkes (1996), and Yerkes and Showalter (1990).
Are there legal restrictions on access or use of the data?
- Access_Constraints: none
- Use_Constraints: none
US Geological Survey Open-File Report 97-163
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 San Fernando 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.
ARC/INFO export files Description of coverage sf-geol.e00 Depositional contacts, faults, and unit labels sf-strc.e00 Strike and dip information, fold axes sf-wells.e00 Exploratory oil wells sf-topo.e00 Topographic base map taken from a scan of a composite negative of the San Fernando 7.5 minute quadrangle (contour interval = 40 ft.)in format ArcInfo export (version 7.x) Size: 14 megabytes
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:
San Fernando, 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.