CARBOKIFEROUS SYSTEM 



425 



red beds," or Fountain formation. The following section shows the 

 components at the Colorado state line. It was made by Mr Siebenthal : 



Section of Casper Formation aloiig Colorado-Wyoming Line 



Bright red sandstone and shale (Chugwater). Feet 



Flaggy buff dolomite 8 



Blocky limestone 4 



Red shaly sandstone 11 



Alternating shaly limestone and clay 11 



Massive pinli dolomite; shows bedding when weathered.... 35 



Salmon-colored sandstone 5 



Limestone 2 



Red sandstone and shale 53 



Limestone 10 



Red shale ? 10 



Limestone 25 



Red sandstone 15 



Massive limestone > 10 



Concealed 110 



Buff to blue limestone 35 



Red, massive sandstone 80 



Limestone 10 



Buff to red, massive sandstone 70 



Bluish to purplish limestone 34 



Salmon-colored, massive sandstone, fine-grained 25 



Dark bi'own, coarse-grained sandstone 2 



Purplish lumpy limestone 4 



Buff arkose conglomerate 6 



Dark brown, coarse sandstone 6 



Massive, shaly, purplish limestone 12 



Limey sandstone and sandy limestone 5 



Concealed, shale ? 15 



Purplish sandstone and arkose, with limestone cement and 



lenses of limestone 4 



Concealed strata to granite 180 



Total 797 



On Duck creek, 4 miles north of the above section, all of the Casper 

 formation is exposed excepting an unknown but prol)ably small amount 

 of the upper beds. The following section was measured by Mr Sieben- 

 thal at this locality : 



