QUARRIES IN CUMBERLAND COUNTY. 
77 
measure up to about 0.4 inch, those of feldspar and mica up to 0.15 
inch. Its minerals, in descending order of abundance, are potash 
feldspar (both microcline and orthoclase), quartz, a feldspar with 
both lime and soda (oligoclase-albite), and biotite, with rarely a scale 
of muscovite. The orthoclase has inclusions of quartz, circular in 
cross section, and the second feldspar is greatly altered. The rock 
contains accessory zircon. 
The quarry opening measures about 75 by 50 by 5 feet in depth. 
Eock structure: The sheets range from 2 to 12 inches in thickness 
and dip not higher than 5°. The joints are shown in figure 4. A 
marked flow structure is indicated by alternating light and dark 
bands, due to varying amounts of black mica and also by the parallel- 
ism of the longer axes of the larger feldspar crystals and biotite 
plates. The granite is traversed by a pegmatite dike, 2 to 3 inches 
Pig. 4. -Structure ;it Grant quarry, Brunswick. 
thick, with a course N. 20° W. The upper sheet shows considerable 
discoloration. 
Plant, none. Transportation by team to railroad near by. 
Product : The chapel of Bowdoin College, at Brunswick, was built 
of the same granite, but the stone was taken from another opening, 
ear this one, which is referred to by George P. Merrill as also fur- 
ishing the stone for the First Parish Church, in Portland.* 1 
The Freeport quarry is one-half mile southeast of Freeport station, 
jm the Maine Central, on the eastern side of a hillock 80 feet high, 
vith northeast-southwest axis. The Freeport Granite Company is 
tow in the hands of a receiver, Wilford G. Chapman, 396 Congress 
street, Portland, Me. 
The granite (specimen 127, a) is a biotite-muscovite granite of a 
" Proc. U. S. Nat. Mus., Vol. 6, 1883, p. 171. 
