DESCRIPTION OF SANDSTONE QUAERIE8 391 



The well-known Massachusetts Longmeadow sandstone and the 

 Connecticut brown stone are obtained from quarries in the Con- 

 necticut valley region, and of the same geological horizon. The 

 Little Falls, Belleville and Newark freestones are from the same 

 formation in its southwest extension into New Jersey. 



Quarries were opened in this sandstone more than a century 

 ago, and many of the old houses of Rockland county are built of 

 this stone. Prof. Mather reported thirty-one quarries on the 

 bank of the Hudson near Nyack. The principal market was 

 ISTew York city, and the stone was sold for flagging, house trim- 

 mings and common walls. The Nyack quarries have been aban- 

 doned, with one or two exceptions, as the ground has become 

 valuable for villa sites and town lots. There are small quarries 

 at Suffern, near Congers Station, near New City, and west of 

 Haverstraw, at the foot of the Torn mountain. They are worked 

 irregularly and for local supplies of stone. The stone is some- 

 times known as " Nyack stone," also as " Uaverstraw stone." 



DESCRIPTION OF SANDSTONE QUARRIES 

 Potsdam Group. 



Fort Ann, Washington County. — A gray sandstone is quar 

 ried two miles north of the village, and at the side of the canal. 

 It is used in Whitehall. 



Whitehall, Washington County. — The cliffs of Potsdam 

 sandstone, east of the town, yield stone for local use. The stone 

 is hard and strong, and is valuable for foundations, retaining 

 walls, and where it can be used without much cutting or 

 dressing. 



Port Henry, Essex County. — The outcrops of the Potsdam 

 sandstone in the town and west of it afford quarrying sites. The 

 quarry of L. W. Bond is worked for the local market, and the 

 towns on the line of Delaware and Hudson Canal Company's 

 railroad in the Champlain valley. The stone is hard, of a 

 gray shade, excepting the surface beds, which are weathered 

 to a rusty red color. It is nearly all silica, and is capable of 

 resisting the ordinary atmospheric agents for years, when the 

 blocks are laid on their bedding planes A serious drawback to 

 its more extensive use is the cost of cutting and dressing. 



