QUARRIES IN HANCOCK COUNTY. 
99 
feet in depth. Drainage is effected by siphoning and pumping in 
spring and fall. No stripping. 
Rock structure: The sheets, from 2 to 6 feet thick, dip 10° to 15° 
E., and exceptionally are thinner at the bottom than the top of quarry. 
Joint and dike courses are shown in fig. 14. All are vertical. B 
forms a heading at the south- side, C one at the north. The rift is 
horizontal and grain N. 75° E. A diabase dike, 2^ feet wide, taper- 
ing toward the north, occurs at the west side of quarry. This is 
described on page 48. There are a few knots, but sap does not occur. 
The plant consists of 5 derricks, 1 hoisting engine, 1 25-horsepower 
compressor, 2 pneumatic plug drills, 1 surfacer, 12 pneumatic hand 
tools, and 1 pump. 
Transportation is effected by cartage of 1,(300 feet to wharf on 
Somes Sound. 
(A) W.-E. heading 
Fig. 14. — Structure at Campbell & Macoruber's quarry, Mount Deserl Island. 
The product is used for buildings, chiefly in New York. Specimen 
buildings : The Crocker residence at Darlington, N. J. ; the Danforth 
Library at Paterson, N. J.; the First National Bank at Baltimore, 
Md. Contract in 1905: The Phoenix National Bank at Hartford, 
Conn. 
The Snowfiake quarry, on Mount Desert, about one-fourth mile 
northwest of Hall Quarry village, is operated by the Allen Granite 
Company. Address, M. L. Allen, Mount Desert, Me. 
The granite (specimen 58, a) is a biotite granite of medium-gray 
shade and fine texture, with porphyritic pinkish feldspars up to 0.4 
inches in diameter. It consists, in descending order of abundance, 
of pinkish potash feldspar (orthoclase), smoky quartz, white trans- 
lucent soda-lime feldspar (oligoclase) , and black mica (biotite), 
own 
together with accessory magnetite, 
with a plagioclase. 
The orthoclase is inters*! 
