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Map Collection
This index covers the detailed geologic maps of California which are distributed among the fourteen irregular issued map and monograph series published by the United States Geological Survey. This index was created and is maintained by Joe Crotts, California State University, Chico, Meriam Library. The index correlates U.S.G.S. geologic maps of California with 7.5' and 15' topographic quadrangles. Maps having scales of 1:125,000 and larger are included in the index.
The index is alphabetical by quadrangle name, with 7.5' quadrangles preceding identically named 15' quadrangles. Click on the first letter of the quadrangle name to access quadrangles with names beginning with that letter. Information provided for each quadrangle are: series name and number of each report containing a geologic map of that quadrangle or portion of it, the extent of coverage of the area, and the scale for those maps made after 1981.
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
NOTE: The indexes are PDF files, requiring the use of Adobe Acrobat Reader
When reading the the description of the area coverage for each report, the following abbreviations are used:
| E | east, east of | NW | northwest | SW | southwest |
| E. | East | R | range | T | township |
| L. | Lake | R. | River | V. | Valley |
| N | north, north of | S. | South | W | west, west of |
| N. | North | S | south, south of | W. | West |
| NE | northeast | SE | southeast |
The fourteen U.S.G.S. series containing geologic maps of California are held either in Meriam Library's Map Collection or in Government Documents.
You will find the following in the Map Collection:
GF Geologic Folio
GP Geophysical Investigations
GQ Geologic Quadrangle
I Miscellaneous Geologic Investigations
MF Mineral Investigations Field Studies
OM Oil and Gas Map
HA Hydorlogic Investigations
MR Mineral Investigation
C Coal Investigations
OC Oil and Gas Investigation
SIM Scientific Investigations Map
You will find the following in Government Documents:
| Code | Description | SuDoc# |
|---|---|---|
| B | Bulletin | I 19.3: (number) |
| OF | Open-file Report | I 19.76: (number) |
| P | Professional Paper | I 19.16: (number) |
| SIR | Scientific Investigations Report | I 19.42/4 (number) |
| W | Water-supply Paper | I 19.13 (number) |