3O NEW YORK STATE MUSEUM 



Lunulicardium (Pinnopsis) vviscoyense Clarke 

 Paracardium doris Hall 

 Lingula ligea Hall 

 Zaphrentis sp. 



Exposures. The basal black band, 15 feet thick, is exposed in 

 the upper part of the ravine west of Varysburg with a few feet of 

 the lighter nodular shales above. 



CHEMUNG SANDSTONE AND SHALES 



Sandstones and shales of this division are the surface rocks over 

 a small area on the hill west of Varysburg, but are not exposed on 

 these quadrangles. 



BIBLIOGRAPHY 



The formations described in this bulletin are also described in 

 the following publications of the New York State Museum : 



Report on the Geology of the Fourth District. James Hall. 

 1842 



Faunas of the Hamilton Group of Eighteen Mile Creek. A. \V. 

 Grabau. Sixteenth Report of the N. Y. State Geologist (for 1896) 



Geology of Erie County. I. P. Bishop. Fifteenth Report of the 

 N. Y. State Geologist (for 1895) 



Geology of the Buffalo Quadrangle. N. Y. State Mus. Bui. 99 



Canandaigua-Naples Quadrangles. Clarke & Luther. X. Y. 

 State Mus. Bui. 63 



Watkins-Elmira Quadrangles. Clarke & Luther. N. Y. State 

 Mus. Bui. 81 



Penn Yan-Hammondsport Quadrangles. Luther. N. Y. State 

 Mus. Bui. 101 



Nunda-Portage Quadrangles. Clarke & Luther. N. Y. State 

 Mus. Bui. 118 



Geneva-Ovid Quadrangles. Luther. N. Y. State Mus. Bui. 128 



Auburn-Genoa Quadrangles. Luther. N. Y. State Mus. Bui. 

 137 



