362 G. H. CHADAVICK STRATIGRAPHY OF NEW YORK CLIXTOX 



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Cataract and Medina. 



Martville and Bear 

 Creek, b 



Furnaceville to Wol- 

 cott Furnace. 



Williamson to Don- 

 nelly. 



Irondequoit, chiefly 

 upper. 



Rochester shale with 

 Gates.rf 



Rochester and "Niaj?- 

 aran dolomite." 



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