The American Journal of Science and Arts, 第 77 巻

abundant acid angle animal appears beds carbonate Carboniferous character chlorid clays coal coast color comet containing Conybeare Cretaceous crystals density deposits direction distance earth epidote equation euphotide experiments fact feet feldspar force Fort Riley fossils Fusulina genera genus geological Gulf heat hornblende inches iron islands isothermal Jurassic Lake land latitude less light lime limestone lower magnesia Marcou mass matter miles mineral Miocene mountains mouth nearly niobium North nucleus observations obtained ocean ophiolites organic oxyd oxygen particles Permian peroxyd plants plates polar portion present Prof protoxyd pyroxene quantity region remarkable river rocks salt sandstone saussurite SECOND SERIES seen shock side silica Silurian Smoky Hill river solution species specific gravity specimens stauroscope strata stream sulphuric supposed surface temperature theory thickness tion Triassic tube upper velocity XXVII