254 BULLETIN OF THE NEW YORK STATE MUSEUM 



It has a specific gravity of 2.708 and weighs 168 pounds 

 per cubic foot. It contains 93.44 per cent of calcium car- 

 bonate, and 3.82 per cent of insoluble matter in dilute hy- 

 drochloric acid. Its absorption percentage is 0.16. It 

 resisted freezing and thawing tests without apparent change, 

 but was calcined at a temperature of 1200*^-1400^ F. It is 

 used in Buffalo for cut-stone trimmings. The quarries are 

 six miles from the New York Central railroad line, but 

 nearly all the stone is carted by teams to Buffalo. 



Buffalo. — The Corniferous limestone and the Onondaga 

 limestone are quarried extensively in this city for all com- 

 mon wall work. 



The Buffalo Cement Company's quarry is the northern- 

 most. South of it is the Yamarthal group of quarries. The 

 drift-earth is thin, covering the quarry beds to a depth of one 

 to four feet, as opened thus far. The limestone is in courses, 

 lying horizontal, and from nine inches to two and a half 

 feet thick. The stone is dark-colored, hard, compact and 

 strong, and is well liked for walls and foundations. It is 

 delivered in wagon loads, in the city, at $6 per cord. 



Black Rock, Erie County.— The Corniferous limestone at 

 this place was formerly quarried for canal construction. 



Niagara Limestone 



Rochester. — Nearly all of the common building stone 

 used in Rochester, is obtained from quarries in the north- 

 eastern and in the western quarters of the city. A very small 

 part of the best gray stone is used for rock-face ashlar 

 work. The business is entirely limited to the city. 



Lockport, Niagara County.— The Whitmore and Carpenter 

 quarries are on the Erie canal, in the south-western part of 

 the town. The upper layers of stone are thin, but are suc- 

 ceeded by thick beds, to a depth of twelve to twenty-four 

 feet. The dip is southward at a low angle. The stone is 

 known as the Lockport gray limestone. It is light-gray, in 



