1. Preliminary geologic maps showing Cenozoic deposits of the Cooperstown and La Grange quadrangles, Stanislaus and Tuolumne Counties, California [cartographic material] Yale Public content 1981. 2002-06-01T04:00:00Z. 2023-03-04T04:01:20Z. Geological Survey (U.S.). The Survey. English. text. Public. Stanislaus County (Calif.) and Tuolumne County (Calif.). Cenozoic.