Summary of Regional Geology in Southwest Wyoming Covered by Fifth Annual Field Conference, Wyoming Geological Association: ABSTRACT

Abstract

The area of southwest Wyoming covered by the Field Conference lies west of the Rock Springs uplift, southwest of the Wind River range, north of the Uinta Mountains and south of the Gros Ventre range. It is underlain at the eastern edge, the Rock Springs uplift, by shelf sediments of Paleozoic, Mesozoic, and Cenozoic age. The western portion is made up of the same age beds of much greater thickness and with considerable stratigraphic variation from the shelf sediments. Because thrust faults are the basic structural feature of the western area, a well exposed section of any considerable orderly thickness is virtually impossible to find. This area of thick sediments and thrust faulting extends into eastern Utah and eastern Idaho although the Conference did not get into these areas. Irregular exposures in the mountains and absence of any data on the transition zone eastward until the Rock Springs uplift is encountered, have made correlation problems particularly difficult. End_of_Article - Last_Page 1106------------