THE MINING AND QUARRY INDUSTRY IOJ4 



71 



Production. Building and other kinds of marble to the value 

 of $230,242 was quarried in 1914, showing a slight decrease of pro- 

 duction as compared with the preceding year. The active quarries 

 were situated in Clinton, Warren, St Lawrence, Dutchess and West- 

 chester counties. Most of the building marble came from the 

 quarries of the South Dover Marble Co. at Wingdale, Dutchess 

 county. The quarries at Gouverneur, including those of the St 

 Lawrence, Northern New York and Gouverneur companies, sup- 

 plied the monumental stock. Black and " shell " marble for deco- 

 rative work were also quarried, the former by Finch, Pruyn & Co. 

 of Glens Falls and the latter by the Vermont Marble Co., of 

 Proctor, Vt. 



Production of marble 



VARIETY 



1912 



1913 



1914 



Building marble 



$155 411 

 84 511 



1 925 



$127 556 

 81 330 

 43 406 



$142 223 

 70 797 

 17 222 



Monumental 



Other kinds 





Total 



$241 847 



$252 292 



$230 242 





SANDSTONE 



Under sandstones are included the sedimentary rocks which con- 

 sist essentially of quartz grains held together by some cementing 

 substance. Among the varieties distinguished by textural features 

 are sandstones proper, conglomerates, grits and quartzites. 



Of the sedimentary rocks whLh occur in the State, sandstone has 

 the largest areal distribution, while in economic importance it ranks 

 second only to limestone. Nearly all the recognized stratigraphic 

 divisions above the Archean contain sandstone at one or more hori- 

 zons. The kinds chiefly quarried are the Potsdam, Hudson River, 

 Medina and Devonic sandstones. A few quarries have been opened 

 also in the Shawangunk conglomerate and the Clinton and Triassic 

 sandstones. 



The Potsdam of the Upper Cambric is the lowest and earliest in 

 age of the sandstones that have a fairly wide distribution and are 

 utilized for building purposes. The most extensive outcrops are 

 along the northern and northwestern borders of the Adirondacks, 

 in Clinton, Franklin, St Lawrence and Jefferson counties. Other 

 exposures of smaller extent are found in the Lake Champlain valley 



