Geography and geology of a portion of southwestern Wyoming with special reference to coal and oil

Abstract

River formation PLATE T. Characteristic topographic types IL Map of irrigated and irrigable land, III. Areal geology map In pocket. IV. Geologic cross sections In pocket. V. Outcrops of Thaynes formation VI. Fossils characteristic of Thaynes and Twin Creek formations VII. Outcrops of Bear River formation and Lazeart sandstone at the type localities VIII