QUARRY MATERIALS OF NEW YORK 193 



The small area of crystalline limestone near Colton, south of 

 Potsdam, has been developed in one or two places for marble. One 

 quarry is situated on the Peter Fallon farm, about 2 miles east of 

 Colton village, and another on the farm of J. C. Leary in the same 

 vicinity. 



HARRISVILLE, LEWIS COUNTY 



Building and monumental marble has been quarried on a small 

 scale in years past at Harrisville, Lewis county. The quarry 

 is about 500 feet north of the railroad at the base of a low hill and 

 consists of an opening 75 feet square. It is an indistinctly banded 

 grayish marble, light in tone, and rather coarse, with a grain 

 diameter of 1 to 3 mm. The banding apparently is a bedding 

 feature, the darker bands containing a higher percentage of im- 

 purities than the lighter ones. The direction of the banding is 

 northeast-southwest and the dip 40 northwest. The impurities, 

 which consist of serpentine, pyroxene and some sulphides, would 

 seem to be a drawback to the use of the stone for polished work. 

 An analysis of an average sample made by R. W. Jones gave the 

 following percentages : 



Si0 2 1.64 



Fe 2 3 .04 



MgCOs 21.79 



CaCOs 76.17 



99.64 



NATURAL BRIDGE, LEWIS COUNTY 



Quarries have been opened in the crystalline limestones in the 

 vicinity of Natural Bridge for the manufacture of lime. The lime- 

 stones are coarse, dolomitic and as a rule not adapted for cut stone. 



The New York Lime Co. has carried on operations for several 

 years in a quarry at Sterlingbush, north of Natural Bridge, and 

 also at the latter place and at Bonaparte Lake where the dolomites 

 attain a degree of purity requisite for lime manufacture. The pro- 

 duct is mainly sold to pulp manufacturers for use in the sulphite 

 mills. 



THE HIGHLANDS — TACONIC AREA 



Crystalline limestones occur in many places in the Highlands 

 region and in the bordering metamorphic area to the north and 

 south. They are specially prominent on the east side of the Hudson 

 where they underlie many of the north-south stream valleys of 



