The Subterranean World

Alston Moor amber Ammonites ancient animals beautiful beds bones bottom buried carats carbonic acid Carboniferous Carniola cave cavern century chiefly coal coal-fields coast colliery colour considerable copper Cornwall crater deep deposits depth descending diamond discovered discovery distance earth earthquake enormous entrance eruption excavations extend extinct fathoms feet fire fissures forests fossil frequently fumaroles furnaces galleries gold grotto Guanaxuato height Herculaneum hundred Ichthyosaurus immense inhabitants iron island Koh-i-Noor labour lake land lava length less likewise limestone lode masses metal miles mineral mines mountain MUD VOLCANOES nature neighbourhood probably produce quantity quarries remarkable rich rise river rock roof ruins scoriæ seams shaft silver Sir Charles Lyell situated smelting solfataras species springs stalactites stalagmite Stalita stone strata stream subterranean sulphur surface thick thousand tons town valley vapours vast vaults vegetation veins volcano walls whole wonderful workmen