6 NEW YORK STATE MUSEUM 



rangle from the northeast corner in a southwestern direction to 

 Cayuga lake at Union Springs. Over most of this higher ground 

 south of this limestone escarpment the drift sheet is quite thin, prob- 

 ably something less than 20 feet on the average, but it is gathered in 

 many places into hills of a drumlin character, and, in a few instances 

 in the vicinity of the foot of Owasco lake, into well defined drumlins. 

 The remaining portion of the area included within the limits of these 

 quadrangles is on the sloping sides of the Cayuga lake, Owasco lake 

 and Salmon creek valleys where there- are numerous ravines, some of 

 which are large and afford fine rock exposures. The rocks are 

 finely and accessibly displayed by nearly 50 miles of cliffs along 

 the lake shores. 



These favorable conditions for the study of the stratigraphy and 

 paleontology of this section of central New York and the easy acces- 

 sibility of the region, led to its early investigation and description by 

 Vanuxem and Hall, while engaged on the Geological Survey of the 

 third and fourth districts, and have made it classic ground to students 

 of those sciences in later days. 



The following geologic formations are represented by colors on 

 the map of the Auburn-Genoa quadrangles in descending order: 



r 



Devonic ^ 



Ontaric or 

 Siluric. . 



Senecan 



A 



Erian 



^ 



Ulsterian. . 

 • Oriskanian 



Cayugan 



C West Hill flags and shales 



Grimes sandstones 



Hatch shales and flags 



Cashaqua shale 



West River shale 



Genundewa limestone 



Genesee black shale 



Tully limestone 

 ^ Moscow shale 



Tichenor limestone 



Ludlowville shale 



Skaneateles shale 



Cardiff" shale 

 ^ Marcellus black shale 



Onondaga limestone 



Oriskany sandstone 

 f Manlius limestone 



Rondout waterlime 



Cobleskill limestone 



Bertie waterlime 

 V, Camillus shale 



I 



