166 THE GRANITES OF MAINE. 
The granite (specimen 97, a) is a biotite granite of general bright- 
pinkish color and medium even-grained texture, with feldspars up 
to two-fifths inch and sparse biotite scales under one-tenth inch. It 
consists, in descending order of abundance, of a pinkish potash fold- 
spar (orthoclase), smoky quartz, cream-colored soda-lime feldspar 
(oligoclase), and black mica (biotite), together with accessory mag- 
netite and zircon. The oligoclase is partially altered to kaolin and 
a white mica. The stone takes a high polish, the durability of which 
is favored by the sparseness and smallness of the mica scales. In 
weathering about the quarries the feldspars whiten from increasing 
kaolinization. The contrasts are chiefly between the two feldspars 
and the smoky quartz. This type of "red granite" is the brightest 
of those occurring in Maine. 
The quarry consists of iw<> openings, one known as tin 1 "old 
quarry," opened in L876, and a new one adjacent to it. The new one 
is about L50 feet square by '20 to 50 feet deep. 
Rock structure: The sheets, from 6 inches to 5 feet thick, dip 10°- 
30° SE. Joints, striking X. 80 W. and dipping steep to the north, 
ni-\\v at intervals of 1 to 5 feet. Others, striking X. 40° E. and dip! 
ping 80° SE.. rect ii- at intervals of 6 inches to 5 feet. The faces of 
this set are coated with calcite and epidote. There is no rift what- 
ever. It is evident from the frequent recurrence of both sets of joints 
and the limited range in thickness of the sheets that the conditions 
are not favorable for quarrying large blocks. Prof. John E. AYolff 
refers to the structure of Redbeach granite. 
The plant consists of a derrick. 
Transportation involves cartage of three-fourths mile to wharf on 
St. Croix River. 
The product is used entirely for monumental and ornamental work 
and find- a market all over the United States. 
The Maim Red Granite Com'pam/s granite works are in the town 
of Calais, one-fourth mile west of Redbeach. 
The red-granite quarries operated by this company at Shattuck 
Mountain, near Redbeach. have already been described and also its 
black-granite quarry at Beaver Lake. 
This company not only finishes the product of its own quarries, but 
has the most extensive plant for polishing granite in the State and 
receives granite for finishing from the Stonington, Mount Desert, 
and North day quarries. It makes a specialty of columns, panels, 
and wainscoting. 
The plant is run partly by water power obtained from a stream 
flowing into the St. Croix River and partly by an auxiliary 150-horse- 
power engine. It includes 1 derrick and 3 hoisting engines. 1 steam 
crane (with a capacity of 25 tons), 4 cutting lathes (for stones of 
a Tenth Census, vol. 10, 1888, p. 116. 
