138 Report on Building Stone of New York. 



A few rods north of the main road, and on the Crosby property a 

 slate quarry has been opened and worked by a Boston company. 

 It is located on the eastern side of a low and rocky ledge, and the 

 covering of white, drift clay on the slate was much like what was 

 seen at Nixon's and at Williams' quarries. This opening is about 50 

 feet square, and 25 to 30 feet in depth. Both green and red slate 

 occur in this quarry. The beds and cleavage planes dip at an angle 

 of 40° easterly. 



About 50 yards north of the Boston company's quarry there is an 

 old openiug, which is now partly full of water ; and north of the 

 latter are the abandoned workings of the Eagle quarry. All of 

 these quarries produced a red slate. In the same range, and a few 

 rods north of the old Eagle quarry, slate is raised by Robert B. 

 Pritchard. He has two openings, of which the southern one only, 

 is worked. It is about 50 feet square, and 30 feet deep. The cov- 

 ering and the location are very similar to the neighboring quarries to 

 the south. The beds dip about 40° a little south of east. The main 

 system of joints runs in the line of dip, and they are vertical. The 

 slate has a deep red color. One derrick, worked by horse power, 

 serves to raise both the stone and the water, of which there is at 

 times a great deal, as the location is swampy. These quarries are 

 within a half a mile of the railroad station at Middle Granville, 

 where the slate are loaded and shipped to market. 



Middle Granville. — In the village of Middle Granville a slate 

 quarry is opened and worked south of the main road, and on the 

 west side of the Pawlet river. It is located on flat ground but a 

 little above the stream, and the covering of drift earth is only a few 

 feet thick. This opening approximates about 250 by 80 feet in size, 

 and has a depth of 50 feet. The bed dips 30° east-north-east. The 

 main joint system runs in the same direction and dips very steeply 

 southward. At the north end of the quarry there is a slip, or joint, 

 whose planes dip at an angle of about 60° east. The purple, green, 

 and variegated varieties are here obtained ; and the greater part of 

 the output is split into roofing slate. One derrick, worked by horse 

 power answers for raising the water and slate. 



Penrhyn State Company's Quarries. — These quarries are from a 

 quarter to three-quarters of a mile north of Middle Granville, in the 

 eastern side of a steep ridge of slate rock. The slate has been opened 

 at several points on the lands of the company, and on the adjoining 



