438 CARBONIFEROUS ROCKS IN CUMR. CO.— LOGAN & FLETCHER. 



Ft. In. 



Greeinisli gray sandstone, soft and ragged, in aggregated 

 . beds of one to ten feet; the aggregations separated by 

 beds of dark red and green argillaceous and arenace- 

 ous shale of one to two feet, having ironstone balls; 

 impressions of plants, among them sigillaricv and 



calamites, prevail in the sandstone 60 



Dark red and green argillaceous shale, with six beds of 

 red and greenish gray sandstone ; the shale is loaded 



wdtli ironstone balls 40 



22. Coal and carbonaceous shale 2 



Gray argillo-arenaceous shale of a tough quality, with 



siigmariw (underclay) 4 



Dark red and green argillaceous shale, with a band of 



sandstone . 16 



Gray argillaceous and arenaceous shale, with ironstone 



nodules and some thin beds of sandstone 10 



Gray sandstone, with stigmarice (understone) 2 



Dark gray shale, with ironstone nodules 22 



Gray sandstone 1 



Gray argillaceous shale 2 



Gray sandstone 1 



Greenish gray arenaceous shale 6 



Gray sandstone, in layers of four inches each 4 



2,134 



RECAPITULATION. 



CoAL^ in 22 seams 5 5 



Carbonaceous shale associated with the coal seams, and 



in one instance without coal 3 10 



9 3 



Underclay or understone, being beds of various material, 

 immediately subjacent to the seams of Coal and Car- 

 bonaceous shale, and universally penetrated by the 

 branches and radiating leaves of the stigmariai 



