Subject ASC0003th3
The geological magazine, or, Monthly journal of geology.
Decade 3:v. 10 (1893), Page 343 (1893)
Smithsonian Libraries
BHL Page 30553851
Keywords
ash augite geology mineral section rhorell-y-big merionethshire pale yellow crack ovoid circle hornblende rich pyroxene cleavage hollow chlorite amphibole epidote