1877.] ^^-L [Ashburner. 



and green, calcareous shale alternating with red, argillaceous 

 shale 70' 



23. Partly concealed. Composed for the most part of green, 

 yellow and gray, calcareous shale alternating with red shale.. 150' 



23. Olive and gray, calcareous shales with a few alternating 

 beds of red shale 50' 



No. V. 

 Clinton (Surgent) Bed Shale 1145' 



21. Red, sandy shale containing irregular deposits of green 

 shale. The red shale is more silicious and massive toward the 

 upper part, where it exhibits a rhombohedral fracture 120 



20. Partly concealed. Probably composed of red, argilla- 

 ceous shale containing alternations of green and gray, cal- 

 careous shale 100' 



19. Red, shaly sandstone containing irregular seams of cal- 

 cite, becoming argillaceous toward the bottom 50' 



Clinton- upper Olive Shale 162' 



18. Crnxy, olive and yellow, calcareous shale containing 

 seams of blue, fossiliferous limestone 30' 



17. Olive and olive-brown, argillaceous and calcareous shale 

 containing seams of blue, fossiliferous limestone 80' 



16. Similar to No. 17, but containing more seams of lime- 

 stone toward the bottom 40' 



15. Blue and gray, argillaceous limestone alternating with 

 dark olive shale ; lower part composed of light yellow, argilla- 

 ceous lime shale, forming the hanging wall of the fossil ore 

 bed. The Clinton upper olive shale contains the following 

 fossils, more particularly in the lower part : Atrypa reticularis, 

 Beyrichia luta, Buthotrephis gracilis, Dnlmania limtdurus, 

 Homaloniitus delphinocephalus, Orthis elegnntii,la, Platyostoma 

 niagarensis, Pterinia emacerata, Rhynchonella neglecta, 

 Strophomena rhomboidalis 12' 



Clinton Ore Bocks 53' 



14. Upper fossil ore bed 10" "^ 



13. Red sandstone and white shale 12" y 3' 



12. Lower ore bed 14" j 



These are asserted to be safe average thicknesses of these three beds, by 

 H. G. H. Tarr, Superintendent of Rock Hill Iron and Coal Co. at Orbisonia. 



11. Ore Sididstone, Its upper part is composed of massive, 

 yellow sandstone under ore bed at Rockhill, while at Saltillo 

 the upper part is very calcareous. The central part is com 

 posed of yellow and green, fossiliferous sandstone (criuoid 

 stems) alternating with shale, while the lower part becomes 

 much more massive 50' 



