QUARRIES IN KENNEBEC COUNTY. 117 
of the Graves quarry (specimen 64, a), page 100, except that the 
feldspars are more pinkish. 
The quarry is 100 feet from north to south by 30 feet from east to 
west, and has a working face on the east 15 feet high. The sheets, 
from 6 inches to 3 feet thick, are horizontal at the north end, but dip 
10° S. at south end. Vertical joints strike N. 75° E. and K50°-55° 
W. Knots are abundant and are up to 2 feet in diameter. 
The quarry is only worked occasionally, and the stone is used 
locally for foundations. 
The Orland quarries, situated in the vicinity of Orland, in Han- 
cock County, were reported as not in operation in 1905 and were not 
visited. 
KENNEBEC COUNTY. 
The quarries in Kennebec County are in the town of Hallowell. 
The /Stinchfteld and Longfellow quarries are in the town of Hallo- 
well, 2-J miles northwest of the city of Hallowell, on the southern 
part of Lithgow Hill. (See map, PL I.) Operator, Hallowell 
Granite Works, Hallowell. 
The granite (specimen 111, a) is a biotite-muscovite granite of 
light-gray shade and fine texture, with porphyritic feldspars usually 
about one-fourth inch in diameter. It consists, in descending order 
of abundance, of slightly bluish translucent potash-feldspar (ortho- 
clase and microcline), smoky (light) quartz, soda-lime feldspar of 
same colors as the other (oligoclase), black mica (biotite), and white 
mica (muscovite), together with accessory garnet, zircon, and apatite. 
The oligoclase is usually undergoing alteration to kaolin and a white 
mica and contains intergrowths of quartz circular in cross section. 
Leaving the porphyritic feldspars out of consideration, the general 
diameter of the particles ranges from 0.25 to 1.0 mm., averaging about 
0.05. The micas are thickly disseminated. The stone takes a fine 
polish, and the polished face has a slight bluish tinge. A microscopic 
description of Hallowell granite will be found in Merrill's Stones for 
Building and Decoration, pages 63, 64. 
Mr. E. C. Sullivan, as a result of tests at the chemical laboratory 
of the United States Geological Survey in May, 1906, found that this 
granite contains 0.060 per cent of C0 2 (carbon dioxide) and that 
warm dilute acetic acid dissolves 0.08 per cent of CaO (lime) and a 
trace of MgO (magnesia). If all of this C0 2 is assigned to the 
CaO, the rock contains 0.14 per cent of CaC0 3 (lime carbonate). 
The lime extracted by this process is in addition to that combined 
with silica in the soda-lime feldspar. The thin sections from the 
Tayntor quarry stone, which is essentially the same, show a little 
carbonate (see p. 120), and the same mineral must occur also in the 
