QUARRIES IN HANCOCK COUNTY. 107 
The product is random stone for bridges and buildings and goes 
to New York and Boston. 
The Stonington granite quarry is on the west shore of Spruce 
Island. 3J miles east-southeast of Stonington. (See map, fig. 15.) 
Operator, E. L. Waite, Stonington. 
The granite (specimen 27, a) is a biotite granite of pinkish buff 
gray color and very coarse semipdrphyritic texture. It consists of 
a pinkish-buff potash feldspar in crystals measuring up to 1 j inches 
in diameter, smoky quartz, cream-colored soda-lime feldspar (oligo- 
clase) in particles and crystals up to one-half inch in diameter, and 
black mica in scales measuring up to 0.15 inch across. The contrasts 
between the tw T o feldspars and the mica are strong. The smoky 
quartz is a little darker than the potash feldspar. Some of the 
pinkish-buff feldspar is rimmed with the cream-colored one. 
Rock structure: The sheets, 5 to 8 feet thick, dip about 40° W. 
Vertical joints strike N. 45° E., N. 45° VY., and N. 80° E. 
The plant consists of 3 derricks and 2 engines. 
The quarry was being opened in July, 1905. 
The Moose Island quarry is in the southeast part of Moose Island, 
piree-fourths mile west-southwest of Stonington. (See map, fig. 15.) 
Operator, John L. Goss, Stonington. 
The granite is a biotite granite identical with that of the (loss 
ind Ryan-Parker quarries on Crotch Island (specimen 20, a), for 
descriptions of which see page 102. 
The quarry, opened in 1873, measures GOO by 200 feet and averages 
ibout 17 feet in depth. One corner of it is 4 feel below low-tide 
level, so that sea water enters, which, to the amount of 300 to 400 
gallons, has to be pumped out daily. 
Rock structure: The sheets, from 1 to 7 feet thick, dip from 5° to 
10° E. Vertical joints striking N. 80° to 85° W. recur at intervals 
)f 200 feet and form a heading on north side of quarry. There is no 
perceptible rift, and the rock does not split well when frozen. The 
15-inch aplite vein, described on page 43, has a course N. 80° W. 
§ap, from 1 to 2 inches thick, is confined to the upper sheets. 
The plant consists of ^derricks and 4 engines, 2 locomotive cranes 
3f 10 and 20 tons capacity, 1 compressor of 800 cubic feet capacity 
per minute, 2 steam or pneumatic drills, 8 pneumatic plug drills, 3 
^urfacers, 2 pneumatic hand tools, 1 steam pump, and 1 windmill 
pump. 
Transportation is effected by cars on track 200 feet to wharf. 
The product is used for bridges and buildings, and goes chiefly to 
New York. 
Specimen structures: The gate house at Central Park and the steps 
of Columbia University, in New York; trimmings of the Hampton 
Dormitory at Cambridge, Mass. 
