U. S. GEOLOGICAL SURVE 
LLETIM NO. 313 PL. 
A. HIGH ISLE QUARRY, MUSCLE RIDGE PLANTATION. LOOKING EAST. 
Showing sheets crossed by a N. 75° W. heading. 
B. ALLEN QUARRY, WEST SIDE OF SOMES SOUND, MOUNT DESERT. LOOKING N. 15° W. 
Showing thin lenticular sheets crossed by a vertical diabase dike, faulted on the fourth sheet from 
bottom of quarry; displacement, 1 6 inches along the sheet. 
