GEOLOGICAL POSITION AND GEOGRAPHICAL DISTRIBUTION 221 



The extent of the outcrops offers additional sites for quarry- 

 ing operations, and the greater use of this stone, and the 

 development of the producing capacity of the district are 

 here suggested. 



Clinton Group 



The rocks of this group are shales, thin beds of limestone 

 and shaly sandstones. They crop out In a narrow belt 

 from Herkimer county west to the Niagara river and bor- 

 dering the Medina sandstone on the south. Sandstone for 

 building has been quarried in the southern part of Herki- 

 mer county ; at Clinton, near Vernoa and at HIgglnsvIlle 

 in Oneida county, from this formation. The nearness of 

 the Medina sandstone, with Its more accessible quarries and 

 superior stone, has prevented the more extensive develop- 

 ment of the quarrying industry In the sandstone of the 

 Clinton group. 



Oriskany Sandstone 



The Oriskany sandstone formation Is best developed In 

 Oneida and Otsego counties. The rock Is hard, siliceous 

 and cherty in places, and generally too friable to make a 

 good building stone. And no quarries of more than a local 

 importance are known In It. 



Caudi Galli Grit and Schoharie Grit 



These rocks are limited to Schoharie and Albany coun- 

 ties and to a very narrow belt which stretches south and 

 thence south-west to Ulster county. The CaudI Galli sand- 

 stones are argillaceous and calcareous and are not durable. 

 The Schoharie Grit Is generally a fine-grained, calcareous 

 sand-rock which also Is unsuited for building. Quarries In 

 these rocks can have local use only. 



Marcellus Shale 



As its name Implies this formation Is characterized by 

 shaly rocks, which are not adapted to building. The 



