THE MINING AND QUARRY INDUSTRY 



953 



Tarrytown and White Plains. Dikes and bosses of massive granite 

 are quite common and have been worked at New Rochelle, Mount 

 Vernon, Lake Mohegan, Westchester co. ; Round Island, Rock- 

 land CO.; and at Pine Island, Orange co. The Cortland series of 

 gabbros and diorites outcropping south of Peekskill may be men- 

 tioned among the qtiarry resources of this region. 



The crystalline rocks of the Adirondacks extend over a great 

 area, but their inaccessibility has prevented the opening of quarries, 

 except on the borders. The varieties found here include massive 

 granites, syenites, gabbros and anorthosites, as well as gneissoid 

 phases of each. 



Building and monumental stone is quarried quite largely 



in Jefferson county. Grindstone island, in the St Lawrence 



river, is noteworthy as a locality for red granite of very attractive 



appearance. The latter has a coarsely crystalline texture, takes 



a lustrous polish, and on account of its deep red color has been 



employed as a substitute for the Scotch granite. It is used for 



building and decorative purposes in many of the western cities and 



in Canada. 



Production of granite in 1904 



County 



Building 

 stone 



Monumental ' Crushed 

 stone 



Rubble, 

 riprap 



Paving, 

 curbing 



Jefferson 



$1 750 



62 500 



24 SSo 



500 



$6 662 



200 {$13 095 



400 70 200 



4 000 1 



$460 



30 000 



300 





Orange^ 



Westchester 



Elsewhere 



$7 265 







Total 



$89 300 



$11 262 |$3o 295 



$83 760 



$7 265 



At Little Falls, Herkimer co., there is an outlier of the Adiron- 

 dack syenite which is worked to some extent. In Fulton county 

 quarries have been opened at Mayfield and Northville, in Lewis 

 county near Port Leyden and in Franklin cotuity at St Regis 

 Falls. 



Anorthosite was quarried at one time near Keeseville, Essex 

 CO. The stone has a handsome chatoyant appearance when 

 polished, and is adapted for monumental and decorative work. 



The total value of the products from the granite quarries of 

 the State amounted in 1904 to $221,882. Of this sum building 

 stone accounted for $89,300; crushed stone for $83,295; rubble 

 and riprap for $30,760 and monumental stone for $11,262. The 

 remainder amounting to $7265, represented the value of paving 



1 Includes Rockland county. 



