GEOLOGY AND GEOGRAPHY OF CLAY DEPOSITS 



101 



were backed up by the ice for a time, during which the valley 

 was converted into a shallow lake in which a large amount of 



Old Ittke bottom, Spencer, N. Y. 



aluminous mud was deposited. This material has been employed 

 for common brick. 



An idea of the depth of clay and alluvium in the Genesee 

 valley may be had from the following table : 



The figures have been taken from the records of salt wells. 

 Yorkf Tork Salt co. Clay 52 ft. 



Piffardf Genesee Salt go. Clay and gravel 64 ft. 



" t Livingston Salt CO. "Soil"* 158 ft. 



Cuylervillef " Soil " 



MtMorrist Eoyal Salt co. "Soil" 



For other localities the following depths are given : 



184 ft. 

 191 ft. 



Auroraf 

 Wyomingf 

 Warsaw t 



" t 



Pioneer Well 

 Standard Salt co. 



, Blue clay 

 Soil and clay 

 Surface, soil 



clay 

 Clay 



and 



15 ft. 

 40 ft. 



26 ft. 

 17 ft. 



Guinlock and Humphrey 

 There are a number of these deposits which are of sufficient 

 interest, geologically as well as commercially, to be mentioned in 

 some detail. 



* The term soil is probably meant to indicate sand and clay, 

 tl. P. Bishop, 5th A.nn. Rep't, N. Y. State Geologist, 1&85. 

 t Ann. Rep't, Sup't Onondaga Salt Springs for 1888, p. 19. 



