UPPER CRETACEOUS. 



681 



East of Rawlins the Cretaceous strata extend around the Park and Medicine 

 Bow ranges into the Laramie Plains. They surround the Fort Union (Tertiary) in 

 the Hanna coal field of Carbon County. Veatch ^^^ has reported on the section, in 

 which he found a marked unconformity between the "Lower Laramie" (equivalent 

 to Laramie of Denver Basin) and the "Upper Laramie" (Lance formation). He 

 gives the following classification: 



Generalized section of Cretaceous and Tertiary rocTcs of central Carhon County, Wyo. 



a It is the belief of Dr. T. W. Stanton that the Mesaverde and part of the Lewis also belong to the Pierre, as that 

 formation is developed east of the Rocky Moimtains. A local name will therefore probably be applied to this lowest 

 division of the Montana in this region. 



