488 CARBONIFEROUS ROCKS IN CUMB CO. — LOGAN & FLETCHER. 



Ft. In. 



Greenish argillaceous shale 7 



Greenish gi*ay sandstone 96 



Greenish concretionary limestone 2 



Greenish gray hard sandstone with a number of large 

 spherical masses still harder. Some of them are 1 

 foot in diameter, and in section exhibit beautiful 

 deep black and bright red concentric circles towards 

 the exterior. These spheres are said to be occasion- 

 ally 4 feet in diameter. This constitutes Dogfish 



Reef 20 



Greenish concretionary limestone, the calcareous con- 

 cretions are lodged in an argillaceous matrix 1 



Gray argillaceous shale 12 



Greenish gray sandstone 6 



Measures concealed, but supposed to be soft 3 



Dark gray argillaceous shale with disseminated day 



ironstone balls 10 



Dark gray argillaceous shale with a course of clay iron- 

 stone balls at the bottom, some of them 6 inches in 



diameter 5 



Blacl' carbonaceous shale, with shells in some parts ... 4 



Dark gray argillaceous shale 10 



Dark gray argillaceous shale with a course of poor 



ironstone balls at the top, making about ^ inch 8 



Greenish gray sandstone fit for grindstones 17 



Greenish concretionary limestone, having much the 



appearance of a calcareous conglomerate 3 



Greenish gray sandstone 5 



Greenish gray sandstone with carbonized drift plants, 



calamites and others squeezed flat 3 



Brown argillaceous shale 1 



Greenish gray sandstone 1 



Reddish gray shale 1 



Measures concealed, probably shale 11 



