U. S. GEOLOGICAL KURVE 
ULLETIN NO. 313 PL. 
A. PLEASANT RIVER BLACK-GRANITE QUARRY, IN ADDISON. LOOKING NORTH-NORTHWEST. 
Showing the sheets crossed by frequent joints striking N. 80° E., the banding of the olivine gabbro, and 
several dikes of whitisn quartz monzonite. 
B. ROUND POND BLACK-GRANITE (UPPER) QUARRV, IN LINCOLN COUNTY. LOOKING 
SOUTH-SOUTHEAST. 
Showing the quartz-diorite sheets crossed by a 2 foot 4 inch dike of coarse pegmatite. 
