PROSSER THE GENESEE SECTION. 67 



Clarksville Well, about one mile southwest of West Clarks- 

 viLLE, x\llegany Co., New York, 



Altitude about 1736' A. T. 



depth. CHEMUNG STAGE. 



100' Olive, argillaceous shale, slightly calcareous. 



125' Lithologic characters about the same, fragments of 



Brachiopod shells, (? Froductella.) 



150' Ditto, fragments of Brachiopods (one possibly a Z>/5a;/a.) 



200' Light gray and olive chips, calcareous with fragments 



of shells. 

 275' Mostly light gray sandstone, with fragments of 



Brachiopods. 

 375' Darker gray sandstone with fragments of Brachiopods. 



" First sand " of driller. 

 410' Light gray, fine grained sandstone, salt water. "Salt 



sand " of driller. 

 435' Olive to greenish-gray argillaceous shale, fragments of 



shells. 

 675' Light gray sandstone mixed with dark gray argillaceous 



shale. "Second sand " of driller. 



750' Ditto, with fragments of fossils. 



800' Oreenish-gray argillaceous shale with fragments of 



fossils. 

 900' Brownish, micaceous sandstone which contains plenty 



of Brachiopod fragments. Called the "Richburgh 



or Bolivar sand " by driller. 



925' Greenish to dark gray argillaceous shale. 



975' Mainly brownish-gray sandstone, fragments of fossils. 



, ^ The Clarksville oil sand. 



^■^ ( Greenish-gray argillaceous shale. 



Bottom of well. 



The Clarksville well was drilled during October, 1891, and I am 

 indebted to Mr. T. B. Love, of West Clarksville, for a set of samples 

 and a record of this well. Mr. Love states that the Clarksville oil 

 sand, which he considers as 75 feet below the Richburgh or Bolivar 

 sand, is 30 feet in thickness. There is no gas, except in the oil sand, 

 and then only a small amount. The wells start with eight to ten 

 bbls. of oil per day, but in about thirty days decline to two. or three bbls. 



