Cretaceous Juana Lopez Member of the Mancos Shale

Ferron Sandstone Member of the Mancos Shale Kmf is in bottom of wash. Juana Lopez Member Kmjl is above. Prionocyclus wyomingensis, Pw,is found in concretions in the light sandy beds at the top of the section. Prionocyclus macombi Pm is found in a bed of concretions about 10 meters lower. This Photo was taken about 3 miles north of Mounds, Carbon County, Utah. The northern Book Cliffs are in the Background.