NEW YORK STATE MUSEUM 



Feet 



Dark bluish gray, somewhat impure limestone, iu beds of 

 variable thickness ; often packed with Orthis cos- 

 tal i s Hall, which occurs with more or less frequency 

 through the whole mass. Other fossils are : L i n g u 1 a 

 huronensis Bill., H a r p e s antiquatus Bill., 

 H. Ottawa en sis Bill.(?), Illaenus arc tu- 

 rns Hall, (I bayfieldi Bill.) , Lituites sp. ( ?) . . . 110 



Gray, tolerably pure limestone in beds 8 to 20 inches thick, 

 separated by earthy seams, the bedding being uneven. 

 Many layers consist of crinoidal fragments, largely of 

 Paleocystites tenuiradiatus Hall. Near 

 the middle of the mass for a thickness of 10 feet, some of 

 the fragments and small, ovoid masses (Bolbopor- 



ites americanus Bill.) are of a bright red color. 90 

 Making for the total thickness of A 338 



Group B (Middle Chazy) 



Impure, nodular limestone containing M a c 1 u r e a 

 magna Les 25 



Gray, massive, pure limestone, abounding in crinoidal 

 fragments 20 



Bluish black, thick bedded limestone, usually weathering 

 so as to show pure nodular masses enveloped in a 

 somewhat impure lighter colored matrix; everywhere 

 characterized by Maclurea jnagna. Xear the 

 middle of this mass for a thickness of about 30 feet, the 

 fossils are silicified and of jet-black color. The more 

 important besides Maclurea, are species of Stropho- 

 mena, Orthis and Orthoceras 210 



Dark, compact, fine grained limestone, with obscure bed- 

 ding, weathering to a light gray. Fossils are infre- 

 quent, but at a single locality were collected Orthis 

 perveta Con., O. platys Bill., Leptaena 

 fasciata Hall, Asaphus canalis Con., 

 C h e i r u r u s p o 1 y d o r u s Bill., Harpes sp. und., 

 Illaenus incertus Bill.. Lichas mingan- 

 ensis Bill., Sphaerexochus parvus Bill., 

 and several undescribed species 20 



