ECONOMIC GEOLOGY 223 



3 From Clinton iron ore. 



4 From Chemung shale, at Randolph. 



5 From Catskill shale at Roxbury and Oneonta. 



This material is produced as a by-product in several industries. 

 For instance near Whitehall red and green mineral paint are 

 produced by grinding up the refuse of the slate mills. At Clin- 

 ton, Oneida county, paint is manufactured from the Clinton iron 

 ore. At Randolph in Cattaraugus county, paint is made from 

 red shales of the Chemung group. At Roxbury, Delaware county, 

 paint is made from red Catskill shales and at Oneonta a similar 

 pigment has been made. 



Marl 



This material is found in many places throughout the state. 

 Dutchess, Columbia, Orange, Ulster, Greene and Albany counties 

 have many small deposits; in central and western New York 

 there are large deposits in Onondaga and Madison counties, 

 particularly in the Cowaselon swamp; it is also found in Cayuga, 

 Wayne, Seneca, Ontario, Monroe, Genesee and Niagara counties. 



It is a deposit formed in standing water and consists chiefly of 

 carbonate of lime. It is largely used as a fertilizer, but is also 

 employed in the manufacture of Portland cement as at Warners, 

 Onondaga county, by the Empire Portland Cement Co., at 

 Montezuma and at Wayland, Steuben county, by Millen & Co. 



Millstones 



Millstones for grinding paint, feed, cement and other purposes 

 are quarried from the Oneida conglomerate in Ulster county in 

 the town of Rochester at Accord, Granite and Kyserike and in 

 Wawarsing at Kerhonkson. 



Salt 



The salt industry of New York is of great importance. Origin- 

 ally Syracuse was the center of this industry, but since the dis- 

 covery of rock salt in and near the Genesee valley where richer 

 brines can be obtained than at Syracuse, the center of the industry 



