442 CARBONIFEROUS ROCKS IN CUMB, CO. — LoGAN & FLETCHER. 



Ft. In. 



Gray argillo-arenaceous sliale, with ironstone 



balls and stigmariw ficoides (underclay) , . 1 G 



Carbonaceous shale 1 



Gray arg-illo-arenaceous shale, with ironstone 



balls and stigmarice ficoides (underclay) 2 6 



Coal 6 



7 2 



Gray argillo-arenaceous shale, with stigmarice leaves 



(underclay) 2 



Gray arenaceous shale, with stigmarice leaves (under- 

 day) 6 



Gray arenaceous shale and rough argillaceous sandstone 9 



Greenish gray arenaceous shale 5 



Gray sandstone 3 



Red and green argillaceous sl^ale, with ironstone balls. . 7 



Gray rough sandstone 17 



Red argillaceous shale, with ironstone balls ; thin beds of 



arenaceous shale and sandstone in the middle 10 



Red sandstonje 1 



Red argillaceous shale, with ironstone balls 1 



Red sandstone 1 



Red and green shale, with ironstone balls and some 



arenaceous beds 18 



Gray sandstone 2 



Gray aitPnaceous shale 4 



Green and red shale 3 



Gray sandstone 3 



(From the upper part of the succeeding bed there arises 

 an upright sigillaria.) 



Gray argillaceous shale 17 



Gray argillaceous shale, with a layer of sandstone. ... 3 



Gray sandstone 6 



Greenish gray argillaceous shale 17 



Gray sandstone 1 



