?6 NEW YORK STATE MUSEUM 



Storm King mountain below Cornwall and also directly opposite on 

 the east bank of the river, on the side of Breakneck ridge. The 

 latter, known as the Bailey quarries, have supplied considerable 

 building stone. 



Granite near Warwick. Several granite intrusions occur in the 

 southeastern part of Orange county, near the New* Jersey state 

 line. Two of them constitute bosses that rise into the conspicuous 

 twin peaks Adam and Eve on the edge of the Wallkill " Drowned 

 Lands." Both are made up of coarse hornblende granite, some- 

 what gneissoid in places and showing pegmatitic and aplitic varia- 

 tions. Mt Eve, the larger, occupies an area about two miles long 

 and a mile wide. Mt Adam is a nearly round mass one-half mile 

 in diameter. There are small knobs of the same granite near Big 

 Island, northeast of Mt Eve, and also in the section southwest along 

 the general axis of the intrusion. Another large intrusion is found 

 on Pochuck mountain, a broad ridge which mainly lies in New 

 Jersey. The northern end that comes within New York State con- 

 sists of coarse quite massive hornblende granite bordered on the 

 west by biotite gneiss. Quarries have been opened on the northern 

 slope of Mt Adam and the western slope of Mt Eve. The Mt Adam 

 Granite Co. worked at the former locality for several years, be- 

 ginning about 1889. The quarry opening has a length of 250 feet 

 and a face from 20 to 30 feet high. The granite is mainly a coarse, 

 medium gray, hornblende variety, but with this is associated a finer 

 grained aplitic granite that forms bands and inclusions in such 

 amount as to prevent the extraction of uniform material. 



The Mt Eve quarries were opened about 1890 by the Empire 

 Granite Co. which was also engaged in operating the Pochuck 

 mountain quarries. They are situated a little way up the western 

 slope of Mt Eve in the notch. The granite is less broken and more 

 uniform in quality than on Mt Adam. It was employed quite ex- 

 tensively for dimension stone which was sold in Orange, N. J., and 

 other places. The quarries lie one and a half miles from the rail- 

 road. 



The Pochuck mountain quarries were worked up to about five 

 years ago and have produced mainly building stone and paving 

 blocks. They are opened for a width of 200 feet along the moun- 

 tain showing a face from 30 to 40 feet high. The granite is slightly 

 foliated in places, but has an attractive appearance, with a pink 

 body mottled by gray and black. Its use as a building stone is 

 exemplified in the post office at Paterson, N. J. 



