QUARRY MATERIALS OF NEW YORK 191 



In the quarry walls a few knots from silicate inclusions are in 

 evidence; they rarely exceed a foot in diameter. Open joints and 

 fissures occur in the upper 15 feet where the marble is more or 

 less discolored and disintegrated, but below the stone is fresh, uni- 

 form and little broken by joints. The surface has been polished 

 and in places is deeply grooved by glacial ice. 



The Rylestone quarry 



The Rylestone quarry, worked up to a short time ago, lies west 

 of the main belt, a mile or more, on the side of a low ridge. It 

 was not operated in 191 2 when inspected by the writer. The marble 

 is bluish gray, with an equal mixture of white and blue calcite. 

 The grain is fine to medium, the particles ranging from 1 to 

 3 mm in diameter. The texture is rather uneven. Apparently there 

 has been considerable loss in quarrying from the presence of vugs, 

 which are apt to occur in the midst of an otherwise sound block. 

 These vugs take the form of small round cavities and of seams a 

 foot or more long and are lined with crystallized calcite, marcasite 

 and brown tourmaline. 



The quarry face extends along the base of the hill for 100 feet 

 and is 50 feet high. In the last operations the. stone was broken 

 down by blasting, which has left much waste. A mill equipped with 

 eight gangs of saws is situated on the property. 



Other quarries near Gouverneur 



The John J. Sullivan quarry, now closed, is situated 500 feet 

 west of the St Lawrence quarries. The pit is about 100 feet long 

 and 50 feet wide. The marble exposed on the edge near the sur- 

 face is coarse-banded, white and blue, of rather light appearance. 

 Some of the beds show disseminated scales of mica, tremolite 

 crystals and other silicates. The quarry equipment has been dis- 

 mantled and the pit allowed to fill with water. 



The Callahan quarry is a small opening near the Extra Dark 

 quarry of the St Lawrence company. The marble is of medium, 

 bluish gray color and moderately coarse texture. The quarry was 

 last worked five or six years ago. 



The D. J. Whitney quarries lie near those of the Northern New 

 York Marble Co. They have yielded considerable quantities of 

 medium to dark-colored stock, used for monumental work. They 

 have been inoperative for several years. . 



The White Crystal Marble Co. opened a quarry about ten years 



