240 BULLETIN OF THE NEW YORK STATE MUSEUM 



thick, and afford blocks of large size. The stone is sus- 

 ceptible of a high polish, and is adapted to decorative pur- 

 poses, preferable for interior work. It has been known as 

 ''coral-shell marble" and '' scutella marble." Nearly all of 

 the foundations and retaining walls in the city of Hudson 

 are of this stone. The Presbyterian church is a good archi- 

 tectural example of its use. The quarries of F. W. Jones 

 are worked continuously and the railroad connects them 

 with the N. Y. C. & H. R. R. R. and the river. 



Champlain Valley 

 Saratoga Springs, Saratoga County. — Blue limestone for 



common masonry has been quarried at several places in the 

 town. 



The largest quarries are those of Charles Slade, Isaac 

 Wager, and Prince Wing and about three miles west. The 

 geological horizon is Calciferous and Trenton. 



The stone is of a dark blue shade. That of the thick 

 beds is rather easily dressed and is worked up into dimen- 

 sion blocks for curbing and house-trimming, and heavy 

 bridge work on the Del. & Hudson Canal Co.'s railroad 

 lines. It has to be carted to Saratoga, where a large part 

 of the total output is used in house-work. 



Sandy Hill, Warren County. — The Sandy Hill Quarry 

 Company has extensive quarries two miles from the Sandy 

 Hill railroad station, and a half mile north-east of the canal. 



The formation is that of the calciferous sand rock. A 

 large area has been worked over to a slight depth. There is 

 a thin covering of earth from one to two feet thick ; then 

 quarry beds one to seven feet thick, down at least to forty 

 feet. The dip is less than 5° to the south. 



Open and vertical, dirt-filled joints are a peculiar feature 

 and facilitate the removal of huge blocks. The long working 

 face and natural drainage are also advantages. And with 

 a complete equipment of steam drills, derricks and movable 

 railways, the capacity of production is large. The annual 



