Subject ASC0000zbs
The Quarterly journal of the Geological Society of London.
v.37 (1881), Page 406 (1881)
Smithsonian Libraries
BHL Page 43971662
Keywords
beddgelert snowdon devitrified rocks #deep red obsidian Tokay Hungary microscope slide Obsidian Tolcsva Deep-red Obsidian Deep red obsidian from Tolesva near Tokay Hungary Geology obsodian