426 N. H. DARTON PALEOZOIC AND MESOZOIC OF WYOMING 



Partial Section of Casper Formation on Duck Creek, If Miles North of Colorado- 

 Wyoming State Line 



Tertiary. Feet 



jiassive dolomite 10 



Concealed 28 



Pink sandstone 4 



Concealed 47 



Pink sandstone 8 



White limestone 10 



Concealed 10 



Red sandstone 5 



Massive limestone 15 



Concealed sliale, perhaps with lenses of limestone 95 



Massive limestone 15 



Concealed 25 



Purple limestone 25 



Flaggy red sandstone 17 



Purple limestone 12 



Shale 19 



Limestone 25 



Shale 3 



Limestone 4 



Shale 3 



Purple limestone 5 



Shale 8 



Purple limestone 10 



Shale (?) 50 



Limestone 3 



Shale 8 



Purple sandy limestone 6 



Shale (?) ; 58 



Blue to purple limestone 2 



Concealed, probably red shale and sandstone ISO^f; 



Gneiss and schist. 



Total 720 



The Casper formation crosses the Union Pacific railroad just east of 



Granite Canyon station, bnt owing to extensive overlap of the Tertiary 

 the exposures are not complete. In the isolated butte a mile northeast 

 of the railroad the following beds appear, probably representing very 

 nearly the entire thickness of the formation. They were measured by 

 Mr Siebenthal : 



