Published monthly by the 



New York State Education Department 



BULLETIN 380 JULY I906 



New York State Museum 



John M. Clarke Director 



Bulletin 101 

 PALEONTOLOGY 1 6 



GEOLOGY OF THE PENN YAN-HAMMONDSPORT 

 QUADRANGLES 



BY 



D. D. LUTHER 



PAGE 



Introduction 37 



Mesodevonic 38 



Moscow shale 38 



Neodevonic 39 



Tully limestone 39 



Genesee black shale 40 



Genundewa limestone 41 



West River black shale 41 



Middlesex black shale 43 



Cashaqua shale 43 



PAGE 



Parrish limestone 44 



Rhincstreet shale 45 



Hatch shale and flags 47 



Grimes sandstone 48 



West Hill flags and shales... 49 



High Point sandstone 51 



Prattsburg shales and flags... 52 



Chemung sandstones 53 



Undulations of the strata 54 



Index 57 



