tr. S. GEOLOGICAL SURVET 



MONOGRAPH 55 PLATE X 



A 7 11 



J\.myru)do7T^ sandstoTve 



JSobcLsile-us - 



DolicJioj'Tzisn 







A. NORTHERN BOUNDARY OF COYOTE BASIN, UINTA BASIN. UTAH 



Showing greenish clays of the 'Exibas^Xe^KS'■T>6iich<yr^^iy^,us zone (level Uinta B 2) capped by '^* Amyyiodotx, sandstone." These 

 clays have yielded mo^ of the smaller mammaliin fauna of this middle horison of Uinta Basin. (After Riggs, 1912.1.) 

 Field Mus. negative 



B. DIVIDE BETWEEN WHITE RIVER CANYON AND COYOTE BASIN, UINTA BASIN, UTAH 

 Showing fossil-bearing sand^one of the Metarhinus ?one (level Uinta B 1). (After Riggs, 1912.1.) Field Mus. negative 



UPPER EOCENE OF NORTHERN UTAH (LEVEL UINTA B) 



