570 H,. W. FATRBANKS 
was reached somewhat above the present. How much this was 
is not known for the mouths of all streams have been flooded by 
the ocean. The last movement has been one of subsidance as 
shown not only by the flooded stream mouths but by Morro 
Bay, a sheet of water whose origin can only be accounted for 
by the theory of a depression. 
It is hoped that the foregoing discussion will convey some 
conception of the interesting and complicated problems 
encountered in the geology of the Coast Ranges. 
HAROLD W. FAIRBANKS. 
BERKELEY, CALIFORNIA. 
June 8, 1808. 
