CHICHAGOF COVE 
75 
distinctly bedded sediments. The coarser agglomerates 
contain angular fragments, a foot or less in diameter, of 
white or greenish porphyry and, rarely, granite. These 
are cemented sometimes by comminuted material of 
FIG. GEOLOGICAL SKETCH MAP OF THE VICINITY OF CHICHAGOF COVE, 
ALASKA PENINSULA. 
By Charles Palaehe. 
the same nature, sometimes by a dark greenish black 
compact material which is found, under the microscope, 
to consist essentially of interwoven hornblende needles. ' 
The finer-grained tuffs have a most varied appearance. 
One specimen is a mass of small angular fragments of 
