EXPLANATION OF PLATE II 
Upper Figure. — Dikes in Marble 
The locality is on the west side of Reid Inlet, Glacier Bay, between 
Hugh Miller and Reid glaciers. The cliff is glaciated, and has been 
so recently bared by the retreat of Grand Pacific Glacier as to be prac¬ 
tically unweathered. From a photograph by G. K. Gilbert, 1899. 
See page 20. 
Lower Figure. — Chert Strata 
The locality is on the northeast side of Halibut Cove, Kachemak 
Bay, Cook Inlet, close to the end of the outer gravel beach. From a 
photograph by G. K. Gilbert, 1899. See page 26. 
