Subject ASC0003tfl
The geological magazine, or, Monthly journal of geology.
Decade 3:v. 7 (1890), Page 537 (1890)
Smithsonian Libraries
BHL Page 30522527
Keywords
rock layers magnify magnified view section circle summit gorner grat gorner grat serpentine slate Slaty Serpentine Gorner Grat geology slaty serpentine microscopic plate