QUARRY MATERIALS OF NEW YORK 163 



and is caught on a 3^ mesh screen, and the finest (no. 6), which 

 is hke very fine sand. 



Roe's quarry 



Roe's quarry, locally known as Roe's spar-bed, is about 8 miles 

 northwest of Crown Point in the vicinity of Towner pond, near the 

 Moriah town line. The locality more precisely is three-fourths of a 

 mile directly south of Towner pond and one-fourth of a mile east 

 of the highway leading past the pond. It is in a very rugged section, 

 quite close to the main anorthosite intrusion, lying well up on a 

 ridge at an elevation of between iioo and 1200 feet, according to 

 the contour map. 



The property was last worked fifteen years or more ago as a 

 source of pottery spar. The output, which must have been con- 

 siderable in view of the size of the. quarry working, was hauled to 

 Crown Point for shipment at a cost of from $1.25 to $1.50 a ton. 

 The property now belongs to H. W. Willcox of Crown Point. 



The opening in its present condition is 75 feet wide running 

 northeasterly into the ridge and has a face 50 feet high. Apparently 

 the body has the shape of an elongated lens, from 75 to 100 feet 

 wide and of uncertain length. The bounds are not clearly revealed 

 by outcrops and there is some doubt as to the extent of the peg- 

 matite outside of the part worked. The longer axis appears to run 

 about N. 50° E. as indicated by a series of test pits below the main 

 opening. Above or northeast of the quarry the country rock, a 

 grayish hornblende gneiss, outcrops within a short distance of the 

 line of strike, so that apparently there is not much more to be 

 quarried in that direction. A large supply exists, however, in the 

 floor of the quarry which could be conveniently worked, and prob- 

 ably also good material would be found to the southwest. The 

 existence of feldspar on the adjoining property to the south of the 

 Roe quarry was reported to the writer, but the locality was not 

 visited. 



The feldspar occurs in very large crystals and aggregates, well 

 segregated. Individuals with a cross-section of 3 feet are not un- 

 common. Some show fine crystal boundaries as they project from 

 the walls of the quarry. There are two varieties of feldspar present, 

 pink and grayish white, the former showing the properties of micro- 

 cline and the latter of oligoclase. They appear to be in about equal 

 amounts. Quartz occurs in subordinate quantity and is unequally 

 distributed, being practically absent over considerable areas. It is 

 pink or milky in color. Graphic intergrowths with feldspar are in 

 II 



