424 



N. H. DARTOX PALEOZOIC AND MESOZOIC OF WYOMING 



Forelle. 



Casper . 



Feet 



Fossiliferous rock 4 



Gray sandstone 20 



Red sandstones 15 



Interval not over 50 



Red sandstone 152 



White to red, shaly sandstone 96 



Reddish, fine-grained, "monument" sandstone 52 



Shelly, drab limestone 2J 



Red sandstones and conglomerates 124 



Red to gray bedded sandstone, with plants 22 



Light to red, coarse sandstone and conglomerate 166 



Drab, calcareous sandstone 1^ 



Light gray to red, coarse sandstone and conglomerate. 86 

 Granite. 



Total 1,640J 



The lower portion of this section was measured on Sand creek near the 

 Pnlpit rock. 



Another section, by Mr Siebenthal, is as follows : 



Section of Gasper Formation on Red Mountain 



Feet 

 Fossiliferous impure limestone (Forelle — overlain by 67 feet 



of gypsum at base of Chugwater formation) 1 



Buff shale and calcareous sandstone 9 



Massive, light sandstone 50 



White, arenaceous shale and a little soft sandstone 55 



White, soft, massive sandstone 18 



White, arenaceous shale. 20 



Red, arenaceous shales and thin, flaggy, red sandstone. ... 90 



Pinli to white, massive sandstone, some arkose 39 



Red fehale 6 



Sandstone 4 



Red shale, sandstone and shale, limestone nodule horizon. . 161 



Concealed red beds, shales, sandstones, and arkose 155 



Granite. 



Total 608 



In these sections onlj^ two limestones remain, and they are inconstant 

 and impure. 



East slope of Laramie mountains. — In the eastern front ridge in 

 Wyoming limestones predominate in the Casper formation to the north, 

 but much, reddish sandstone is, also included. Farther south and in Colo- 

 rado the formation changes into red sandstones, constituting the '^ower 



