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
Phillips, 1825 - 270 pages
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accumulation active volcanos aeriform fluids aperture appears aqueous vapour atmosphere augite augmentation Auvergne basalt caloric cavity ceteris paribus circumstances column comminution condensation consequently considerable consolidation continually crater crust crystalline particles crystals current of lava degree dilatation diminished direction distance earth earthquakes ebullition effect ejected elastic fluids elevation erup escape exist expansive force explosions external felspar felspathic fissure fluidity forces of repression fragmentary matters fragments frequently globe gneiss grain granite greater habitual heated increase intense interior intumescence irregular island Isles lava currents less leucite liquid lava manner mass of lava mineral neighbouring numerous observed occasioned occur orifice parasitical cones paroxysms phase pressure produced proportion proportionately quantity ratio repressive force rise scoriae scoriform sides Solfatara solid specific gravity steam strata Stromboli substances superficial surface take place temperature tion trachytic vary directly vertical Vesuvius violent Vivarais volcanic cone volcanic eruption volcanic mountain volcanic phenomena volcanic vent weight