Subject ASC0003s68
    The geological magazine, or, Monthly journal of geology.
    [Decade 1]:v. 2 (1865), Page 390 (1865)
    Smithsonian Libraries
    
      BHL Page 30540794
    
    
Keywords
geology cambrian rocks cambrian rocks bray head quartz slate grits Bray Head cross section diagram section rock dip grit mountain hill