180 THE GRANITES OF MAINE. 
The quarry consists of two openings, one 150 feet square and 10 to 
25 feet deep, another 200 by 150 feet and from 10 to 40 feet deep. 
Rock structure: The sheets, from 1 to 10 feet thick, are horizontal, 
undulating, or dip up to 15° SE. with a 3-inch bed of sand in upper 
part. Joints, striking N. 45° E. and dipping 65° NW., form a head- 
ing in the newer opening, and in the older one recur at intervals of 
1 to 5 feet. Another set, confined to the newer opening, striking N. 
50° W., and dipping 90°, forms the northeast and southwest walls of 
the quarry and a 10-foot heading in the middle. Knots are somewhat 
plentiful. An 18-inch basic dike strikes northeast. 
The plant consists of 4 derricks and 1 hoisting engine. 
The Bear Hill quarry is in the town of Mollis, on Bear Hill, 1 mile 
west-southwest of Bradbury station (ITollis Center), on the Port- 
land and Rochester Railroad. Operator, E. M. Bradbury, Hollis 
Center, Me. 
The granite (specimen 136, <<) is a biotite-muscovite granite of 
medium-gray shade with a slight greenish tinge, evenly spangled 
with black and white mica, and of medium (inclining to fine) even- 
grained texture, with feldspar up to three-tenths and mica up to one- 
tenth inch. It consists, in descending order of abundance, of a 
grayish potash feldspar (orthoclase and microcline), slightly smoky 
quartz, grayish soda-lime feldspar (oligoclase), black and white mica 
(biotite and muscovite ). with accessory apatite and a secondary white 
mica. As the quartz is about of the same shade as the feldspar the 
only contrast is between the gray ground and the micas. In the stone 
at the smaller openings the feldspars are milk-white translucent, with 
a very slight bluish tinge, which gives the granite a general light-gray 
shade. 
The quarry, opened in L901 (although stone had been taken out as 
early as 1855), consists of an older opening of irregular shape, from 
which about 700 cubic yards have been quarried and an acre stripped, 
and of a newer opening 50 feet square and 5 to 10 feet deep. The 
stripping consists of 1 foot of soil (woods). 
Rock structure: The sheets are lenticular, up to 6 feet thick, and 
horizontal. Vertical joints strike X. 55° YV.. and form a heading on 
the southwest : joints also strike X. 30°-35° E., recurring at intervals 
of 30 feet or more. The rift (horizontal) is marked, and the grain 
is vertical, striking east and wot. Pegmatite dikes, up to 6 feet thick, 
strike X. 10°-20° W., recurring at intervals of 30 feet or more, and 
in places branching. They consist of quartz, feldspar, biotite, and 
muscovite. A basic dike, from 1 to 12 inches thick and with a 
course X". 30° E., traverses the entire quarry, crossing the pegmatite 
dikes and dying out on the northeast. The sap is marked on upper 
sheet and also along the joints and up to 6 inches in thickness. 
The plant consists of 3 derricks and 1 ditch hand pump. 
