Preliminary geologic map of the Shamrock Hills quadrangle, Carbon County, Wyoming

The Shamrock Hills 1:24000-scale quadrangles is located in south-central Wyoming on the eastern margin of the Great Divide Basin, a sub-basin of the Greater Green River Basin. Upper Cretaceous through Eocene formations were studied and mapped, in addition to the sedimentology, geochronology, and coal stratigraphy. Data from the map are reported in WSGS Open File Report 15-8.