Now showing items 1-8 of 1

    Cretaceous - Fox Hills sandstone; Pierre shale; Niobrara formation; Carlile formation; Greenhorn formation; Graneros shale; Dakota Sandstone; Fuson formation; Lakota sandstone; Morrison shale (1)
    Geology -- United States --Maps (1)
    Geology -- Wyoming -- Crook County -- Maps (1)
    Groundwater -- Wyoming -- Crook County -- Maps (1)
    Jurassic - Morrison shale; Sundance formation (1)
    Neogene - unnamed strata (1)
    Paleogene - unnamed strata (1)
    Triassic - Spearfish formation (1)