200 



NEW YORK STATE MUSEUM 



Si0 2 .90 



r.} ■•* 



MgCOs 10.00 



CaCOs 86.60 



P2O5 02 



H 2 10 



99.00 



OSSINING, WESTCHESTER COUNTY 



The locality at Ossining has interest as affording structural 

 marble for several buildings, including the State Hall at Albany. 

 The quarries are situated in the yard of the State prison. The 

 marble is a white or gray dolomite, rather crumbly in texture, and 

 hence not well adapted for exterior work. 



The Ossining Lime Co. has a flux and lime quarry south of the 

 village near the railroad. The stone contains about 20 per cent 

 magnesia, as shown by the following analysis : 



Si0 2 87 



A1 2 3 57 



Fe 2 3 : .25 



MgO 19-95 



CaO 31 40 



WHITE PLAINS, WESTCHESTER COUNTY 



A quarry about a mile north of White Plains and just west of 

 the Harlem Railroad has been worked as a source of material for 

 lime and crushed stone. It is known as the James O'Connell 

 quarry. An analysis by Huntington gives the following com- 

 ponents '} 



Si0 2 2.08 



f£S} • 56 



MgCOa 37-79 



CaCOs 58.72 



99.15 



PLEASANTVILLE, WESTCHESTER COUNTY 



A white dolomitic marble that is found near Pleasantville has 

 supplied considerable building material for New York City and the 



1 Eckel. " The Quarry Industry in Southeastern New York." 20th Report 

 N. Y. State Geologist, 1902, p. 172. 



