GEOLOGIC MAP OF THE BUFFALO QUADRANGLE g 



character, 5 to 6 feet thick, at the top of the formation has been 

 extensively quarried in Buffalo by the Buffalo Cement Co. and also 

 at Williamsville for the production of natural cement. The cement 

 produced at Akron, 12 railes east of the quadrangle, is also from 

 the same stratum. 



At the quarry of the Buffalo Cement Co. the Bertie waterlime 

 is 53 feet thick, as shown by the core of a well drilled in 1883, now 

 in the museum of the Buffalo Society of Natural Sciences. 



This rock is exposed along the west side of Niagara river, between 

 the International bridge and the stone church; in the bed of Scaja- 

 quada creek in Forest Lawn cemetery; very abundantly in the 

 Buffalo Cement Co.'s quarries and at Williamsville, on this quad- 

 rangle; also at Falkirk, Indian Falls, Morgan ville, North Leroy, 

 Garbuttsville, Honeoye Falls, East Victor, Phelps and other places 

 to the east of this quadrangle; and toward the west at Bertie Ont.,. 

 whence the name of the formation is derived. 



This formation is characterized by an abundant and peculiar 

 crustacean fauna; in fact it has long been famous for its strange 

 lobsterlike fossils belonging to the extinct orders, Eurypterida 

 and Phyllocarida and the cement quarries of Buffalo have proved 

 veritable treasure chambers of these odd creatures. The following 

 species have been observed in the vicinity of Buffalo. 



The ostracod, Leperditia scalaris Jones, occurs 

 abundantly in the lower part of the formation as exposed along 

 Scajaquada creek in Forest Lawn cemetery. 



The cement layer has furnished the following species of fossils : 

 Ceratiocaris acuminata Hall (Cerati- E. scorpionis Grote & Pitt 



ocaris grandis Pohlman) Pterygotus acuticaudatus Pohlman 



Eurypterus lacustris Hall P. bilobus Huxley & Salter 



E. remipes De Kay P. buflFaloensis Pohlman 



E. giganteus Pohlman P. cummingsi Pohlman 



E. pustulosus Hall P. macrophthalmus Hall 



E. robustus Hall P. quadraticaudatus Pohlman 



E. pachychirus Hall P. globicaudatus Pohlman 



E. dekayi Hall P. cobbi Hall 



Dolichopterus macrochirus Hall Leperditia scalaris Jones 



Eusarcus grandis Grote & Pitt 



Besides these crustaceans some brachiopods belonging to the genera 

 Orbiculoidea and Lingula and some seaweeds have been found; 

 among these Bythotrephis lesquereuxi Grote and Pitt. 

 Cobleskill waterlime 



The bed which overlies the Bertie waterlime has lately been 

 properly correlated by Hartnagel' with the Cobleskill limestone 

 (formerly Coralline limestone) of eastern New York. Previously it 



'State PaleontoL An. Rep't 1902. N. Y. State Mus. BuL 'dp. 190.5. 



