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    Carboniferous - Calaveras formation (1)
    Cretaceous - unnamed strata (1)
    Geology -- California -- Alpine County -- Maps (1)
    Geology -- California -- Amador County -- Maps (1)
    Geology -- California -- Calaveras County -- Maps (1)
    Geology -- California -- Tuolumne County -- Maps (1)
    Geology -- United States --Maps (1)
    Neogene - unnamed strata (1)