rl68 NEW YORK STATE MUSEUM 



Green Pond conglomerate 

 Central Valley, Orange co. The Green Pond conglomerate has 

 been used to a small extent for foundation and wall stone. The 

 small bridge, one arch of which is shown on pi. 56, is located near 

 Central Valley, Orange co. and was built under the direction of 

 Mr Eichard Ficken from blocks of Green Pond conglomerate. 

 Used in the manner shown, it is a decidedly attractive material 

 and much preferable to the rough dressed limestones so often 

 used for similar bridges and walls. 



Pine Hill quartzite 



The white and red quartzites of the Pine Hill formation are 

 well exposed along the crest and at the southern end of Pine 

 hill. They have been little used, as their hardness makes dress- 

 ing diflScult. It is probable that they could be profitably ex- 

 ploited, and that stone of this quality and color would find a 

 ready market in Xew York city. 



Longwood red shales 



Highland Mills, Orange co. Several quarries (46) in this forma- 

 tion along the west side of Pine hill, near its southern end, are 

 worked rather extensively. The red shales are used on most of 

 the roads in the neighborhood, and, for light traffic, are an 

 admirable road metal. Under heavy traffic, however, specially 

 in wet weather, they grind up into a fine stiff clay. 



Bellvale flags 



Monroe, Orange co. Two quarries in the Bellvale flags are near 

 Monroe. The first, the Davison quarry (45), is located near the 

 Seven Springs Mountain house; the second, that of O. H. Cooley 

 (44), is nearer Monroe. The beds worked at both quarries are 

 thin and irregularly bedded flagstones, gray in color, and with 

 much waste material. The quarries have, however, furnished a 

 considerable amount of material for local use as steps, curbing, 

 flagging, etc., as no other material suitable for these purposes 

 occurs in the vicinity. 



