Considerations on Volcanos: The Probable Causes of Their Phenomena, the Laws which Determine Their March, the Disposition of Their Products, and Their Connexion with the Present State and Past History of the Globe ; Leading to the Establishment of a New Theory of the Earth |
Common terms and phrases
accumulation active volcanos aeriform fluids aperture appears aqueous vapour atmosphere augite augmentation Auvergne basalt beds caloric Cantal cavity ceteris paribus circumstances clinkstone column comminution condensation consequently considerable consolidation continually crater crust crystalline particles crystals current of lava degree dilatation diminished direction distance earth ebullition effect ejected elastic fluids elevated erup escape exist expansive force explosions external felspar felspathic fissure fluidity fragmentary matters fragments frequently globe gneiss grain granite greater habitual heated hornblende increase intense interior intumescence irregular island Isles lava currents less leucite liquid lava manner mass of lava mineral numerous observed occasioned occur orifice overlying parasitical cones paroxysmal phase phonolitic pressure produced proportion proportionately quantity remarkable repressive force rise rocks scoriæ sides Solfatara solid specific gravity steam strata Stromboli structure substances subterranean expansion superficial surface take place temperature tion trachytic Vesuvius violence Vivarais volcanic cone volcanic eruption volcanic mountain volcanic phenomena volcanic vent weight