176 THE GRANITES OF MAINE. 
The product is used for curbing and buildings, and finds a mark 
in Rochester, N. H. The Parsons Memorial Library, of Alfred vil 
lage. is built of this stone. 
The & 'pence & Coombs black-granite quarry is in the town o 
Berwick, 1J miles southeast of North Berwick village and statio 
Operator, Spence & Coombs, Berwick. Me. 
This rock (specimen 139, a) is a gabbro of very dark olive-brownisl 
color and medium ophitic texture, consisting, in descending order o 
abundance, of longitudinal crystals of grayish olive-brownish lime 
soda feldspar (labradorite) between which are particles of diallage 
black mica (biotite), magnetite, and a little pyrite, together with 
secondary hornblende, analcite, zoisite, and calcite. The freshly 
quarried stone becomes somewhat brownish on exposure. It takes a 
high polish and the cut or hammered surface is almost white. 
The quarry consists of two openings, about 25 feet square by 5 
10 feet deep. 
Rock structure: The sheets, from G to 8 feet thick, lie nearly ho 
zontal, and are crossed by vertical joints striking X. 25°-30° W. a 
by another set striking N. 45° E. and dipping 05° SE. and recurri 
at intervals of 6 to 20 feet. 
The plant consists of 2 derricks. 
The quarry is worked only occasionally and the stone is used en- 
tirely for monuments. In L905 a carload of it was shipped to Coin 
cord, N. H. A monument made of this gabbro for a Mr. Johnson 
was erected in 1885 in a cemetery at Somersworth, N. H., and is 
reported to be in as good condition now as then. 
The Richer quarry is in Biddeford city, at 19 Granite street. 
Operator, Charles Kicker. li> Granite street, Biddeford. 
The granite (specimen 129, a) is a biotite granite of general light- 
gray -hade with conspicuous smoky quartz and slightly bluish whitl 
feldspar and of coarse, even-grained texture, with feldspars up tc 
0.75 inches and biotite under 0.2 inches. Tt consists, in descending 
order of abundance, of a slightly bluish milk-white potash feldspa] 
(microcline and orthoclase), quite smoky quartz, milk-white soda 
lime feldspar (oligoclase), and black mica (biotite), together wit! 
accessory magnetite, zircon, and apatite, and secondary white niic? 
and kaolin, derived from the alteration of the oligoclase. The con 
trasts in this granite are unusually brilliant. They are between tto 
white of the feldspars, the gray of the very vitreous quartz, and th< 
black of the mica. The stone takes a fine polish, but the largenes 
of the biotite scales does not favor its durability under exposure t< 
the weather. 
The quarry, opened in 1865, is 100 by 50 and from 5 to 25 fee 
deep. There is no drainage problem nor stripping. 
