NONMETALLIFEROUS MINERALS, SOUTHEASTERN ALASKA. 81 
conglomerates, sandstones, and shales. The beds are all more or 
less faulted and appear to oceupy basins formed in the more ancient 
rock beds. The coal is with few exceptions an impure lignite and 
occurs in narrow seams of no commercial value. 
At Murder Cove explorations were made on a seam 5 feet thick. 
located 2 miles from deep water. This deposit, which contains the 
best grade of coal in the region, proved to be of very small extent and 
not worthy of further development. No developments have been 
made at any of the above localities and most of the prospects have 
been abandoned. 
a For a more detailed discussion of the coal deposits on Admiralty Island see Wright, C. W., A recon- 
naissance of Admiralty Island: Bull. U. S. Geo!. Survey No. 287, 1906, pp. 151-15-1. 
Bull. 314—07 6 
