Subject ASC0003s8v
The geological magazine, or, Monthly journal of geology.
[Decade 1]:v .5 (1868), Page 209 (1868)
California Academy of Sciences
BHL Page 36244327
Keywords
surface of the stones depiction of bed of chalcedony rock agate sweeping continuous curves bed of grey chalcedony "folded" composition agatescent jasper folded agate banded brecciated concretion stellar agate nested agate geology