Geologic map of the Thompson Springs quadrangle, Grand County, Utah (M-239) Recreation Books and British Columbia

and British Columbia

Includes "fast facts" and "did you know" questions and insights

you'll be hard pressed to make the most of the day

but a few reach 200 feet

Edward Abbey

Geologic map of the Thompson Springs quadrangle, Grand County, Utah (M-239) Recreation Books and British ColumbiaBy: H. H. Doelling and P. Kuehne The Thompson Springs quadrangle is located in east central Utah along the Interstate 70 (I 70) corridor. The geology is dominated by the Upper Cretaceous Mancos Shale, which was deposited in the Western Interior Seaway. Exposed strata range in age from Late Jurassic to Late Cretaceous and include (in ascending order) the Brushy Basin Member of the Morrison Formation, Cedar Mountain Formation (Yellow Cat, Poison Strip