The Library has many of the maps identified through the sources below:
Search for titles in OneSearch - Fresno State Books & Media
Geologic Atlas of California, Fresno sheet 1:250,000
Map (PDF, 11.6MB) Explanation (PDF, 3.0MB)
In the Library: 1st floor, Maps vertical G 4361 .C5 s250 .F7
• Some parts of Fresno County are on other sheets: Index to Geologic Atlas of Caliornia (1:250,000)
National Geologic Map Database
• National Geologic Map Database Catalog Search U.S. Geological Survey
California Geological Survey (formerly California Division of Mines and Geology)
• California Regional Geologic Maps
• California Geological Survey Publications
• Online Maps and Data
List of U.S. Geological Survey Geologic and Water-Supply Reports and Maps for California via Hathitrust Digital Library
In the Library: 1st floor, Maps Reference Z 7935 .L58 1987
Consolidated Index of Publications of the [Calif.] Division of Mines and Predecessor State Mining Bureau (1880-1943) via Internet Archive
California Division of Mines. Bulletin 131
In the Library: 1st floor, Government Information, Reference TN 24 .C2 A3 no.131
Geologic Map Index of California
In the Library: 1st floor, Maps Reference G 4361 C5 1987 F8
Index to Geologic Maps of California via Internet Achive
In the Library: 1st floor, Maps Reference TN 24.C2 A33 nos 52, 52a-b, 130, and supplements for 1976-78