168 THE GKANITES OF MAINE. 
generally up to two-fifths inch (exceptionally one-half inch) and 
sparsely disseminated biotite up to one-tenth inch. It consists. In 
descending order of abundance, of a pale lavender-colored potash- 
feldspar (orthoclase), smoky quartz, milk-white soda-lime feldspar 
(oligoclase), and a little black mica (biotite), together with accessory 
magnetite and secondary epidote, zoisite, and calcite. The feld- 
spars are considerably altered to white micas, and the biotite is also 
largely altered to chlorite. This stone resembles that of the Goss 
and Ryan-Parker quarries of Crotch Island in the lavender tint 
of its orthoclase, but its texture is finer. Their resemblance may be 
found to be still greater in lower and fresher sheets. 
The quarry, a small opening about ^00 feet northwest of Mr. Fish's 
house, has been worked only occasionally. The sheets are up to 5 ] 
feel thick and lie horizontal. 
Tin Bodwell- Jonesboro quarry is in the town of Jonesboro, 2 
miles east of Jonesboro village. Operator. Bodwell Granite Com- 1 
pany; office, Rockland, Me. 
The granite (specimen 86,A) is a biotite granite of general grayish- 
pink color and of coarse (inclining to medium), even-grained texture, 
with biotite sparsely disseminated and up to one-twentieth inch in I 
diameter. It consists, in descending order of abundance, of a pink- . 
ish potash feldspar (orthoclase), smoky quartz, cream-colored soda- 
lime feldspar (oligoclase), and a little black mica (biotite), together 
with accessory magnetite and secondary while mica, kaolin, and 
chlorite. The orthoclase is intergrown with plagioclase, and the 
oligoclase is here and there hugely altered to a white mica and kaolin 
and the biotite to chlorite. The contrasts are chiefly between the two 
feldspars and the smoky quartz. The stone takes ; » line polish, the 
durability of which i> favored by the smallness of the biotite scales. 
The quarry, opened about 1^7.~>. measures about TOO feet N. 80° E- 
S. 80° W. by 200 feet from north to south, and has a depth of 10 to X) 
feet. Its area is irregular, as shown in fig. 87. Its drainage requires 
occasional pumping. 
Rock structure: This quarry shows a greater variety of dike 
courses than any other of the Maine quarries. The sheets, from (j 
inches to 5 feet thick, are horizontal, with slight undulations. The 
joint and dike courses are shown in fig. 37. A recurs on the north 
and south sides of quarry and in middle, and forms a heading on the 
south; B forms a heading on the northwest side; C appears on the 
south wall, intersecting the heading: I) dips steep south, and also 
intersects the south wall. The rift is vertical, with course N. 70° W| 
There are two dikes of reddish aplite (a), one () feet thick, another 4 
feet thick; a third (&), also reddish, is from 3 to 6 feet thick; a 
grayish aplite dike (<?), from 1 to U inches thick, can be traced from 
200 to 300 feet, cutting all the other dikes. Thin sections of a are 
