Online Links:
| Value | Definition |
|---|---|
| contact, approx. located | Contact whose position is not precisely located |
| contact, certain | Observed geologic contact |
| contact, inferred | Contact whose position is inferred |
| detachment fault, approx. located | Detachment fault whose position is not precisely known |
| dike, approx. located | Dike whose position is not precisely known |
| dike, diabase | Location of a diabase dike |
| fault, approx. located | Fault whose position is not precisely known |
| fault, concealed | Concealed fault whose position is inferred |
| map boundary, certain | Boundary of mapped area |
| named fault | Fault with a proper name |
| thrust fault, approx. located | Thrust fault whose position is not precisely known |
| 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, certain | Observed synclinal fold axis |
| f.a., syncline, concealed | Concealed synclinal fold axis whose position is inferred |
| Value | Definition |
|---|---|
| bedding | Bedding orientation |
| air photo attitude | Attitude of bedding as determined from air photos |
| approx bedding | Bedding whose orientation is not precisely known |
| ot bedding | Overturned bedding |
| vert bedding | Bedding with a dip of 90 degrees |
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 90 |
| Units: | degrees |
| Resolution: | 1 |
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 358 |
| 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.
To provide to the public a digital geologic map database of the Topanga 7.5' quadrangle, southern California.
Are there legal restrictions on access or use of the data?Access_Constraints: None
Use_Constraints: None
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 Topanga 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 tp-geol.e00 Depositional contacts, faults, and unit labels tp-strc.e00 Strike and dip information, fold axes tp-foss.e00 Fossil localities tp-topo.e00 Topographic base map taken from a scan of a composite negative of the Topanga 7.5 minute quadrangle (contour interval = 25 ft.)in format ARCE (version 7.x) Size: 21 |
|---|---|
| Network links: |
http://pubs.usgs.gov/of/1995/of95-091/topnga.tar.gz |