Slates. 141 



15 feet of the top rock is not workable, and is included in the strip- 

 ping. There is a little green slate on the east side, at the top 

 but the mass of the quarry is bright-red in color. The main system 

 of joints run east and west and vertical. A second system runs 

 obliquely to the first, south-south-west, and dips. steeply to the west- 

 north-west. The company working these quarries is known as the 

 Anniflan Slate Trust, of Boston, of which Geo. F. Pinkham is the 

 principal owner. It was first opened about three years ago. The 

 present company reopened it in July, 1887. The plant consists of 

 one derrick and one pump, both run by steam power. 



Half a mile north of the above is the quarry of Hugh Williams, 

 of Middle Granville, and on lands of Edward S. DeKalb. The 

 opening is about 80 feet by 50 feet, and at least 30 feet deep. The 

 stripping is drift earth, and about three feet thick. The lower beds 

 dip uniformly at an angle of 40° north 85° east, and the cleavage 

 planes have the same direction. The main system of vertical joints 

 runs north 80° east ; the other sets of joints are quite irregular. The 

 beds have been worked down 60 feet on the foot-wall of the quarry. 

 The color is bright red. The best material is split into roofing slate. 

 The more solid stone of the waste or refuse is used for building stone. 

 One derrick serves for hoisting the stone and water. The quarry 

 was first opened in 1884 ; it was reopened April, 1887. 



The slate from these quarries is carted to the railroad at Middle 

 Granville, three and a half miles distant. At Raceville the railroad 

 is within one and a half miles of the quarry. 



East Whitehall, Washington County. — This range, or vein, 

 of red slate, is in the town of Whitehall, nearly six miles from 

 Middle Granville, and the same distance south-east of White- 

 hall. The locality is known as Hatch Hill. There are four quarries, 

 opened within a length of a half a mile, from north to south, on the 

 line of strike of the rock. The surface is wet and swampy, and on 

 the west there is a ridge about 100 feet high above the quarries. 



W. A. Nixon has the most southern opening on the hill. It is not 

 yet developed into a producing quarry, although good, workable slate 

 rock has been uncovered. 



R. A. HalPs quarry is at the edge of the swamp on the south and 

 close to the hill, on the west side. It is about 200 by 100 feet and 

 100 feet deep on the western foot- wall. On the east side the slate 

 is covered by swamp earth and clayey drift ; on the west the rock 

 crops out in the surface. The beds dip easterly at an angle of 40°. 



