Photogeologic map, Fredonia NE quadrangle, Coconino and Mohave Counties, Arizona
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The Iris SE and Doyleville SW quadrangles, Saguache County, Colorado include part ot the Cochetopa mining district. Photogeologic maps of these quadrangles show the distribution of sedimentary rocks of Jurassic and Cretaceous age; precambrian granite, schist, and gneiss; and igneous rocks of Tertiary age. Sedimentary rocks lie on an essentially flat erosion surface on Precambrian rocks. Folds appear to be absent but faults present an extremely complex structural terrane. Uraniferous deposits occur at fault intersections in Precambriam and Mesozoic rocks.
Flat Top Mountain NE quadrangle is on the eastern rim ot the Washakie Basin. The Wasatch and Green River formations crop out in the map area and dip generally to the west. The even and persistent bedding of the Green River formation, combined with the strong benching of a few beds, makes it possible to distinguish easily on photographs stratigraphic units within the formation. Structure contours were drawn on one ot these units.
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