A Description of Active and Extinct Volcanos: With Remarks on Their Origin, Their Chemical Phaenomena, and the Character of Their Products, as Determined by the Condition of the Earth During the Period of Their Formation. Being the Substance of Some Lectures Delivered Before the University of Oxford, with Much Additional Matter |
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Page 12
... feet in depth . Its structure is simple enough , consisting wholly of loose masses of slaggy * This is very well laid down in Desmarest's Map of Auvergne . Paris 1823 . lava , sufficiently decomposed to allow of the growth of 12 On the ...
... feet in depth . Its structure is simple enough , consisting wholly of loose masses of slaggy * This is very well laid down in Desmarest's Map of Auvergne . Paris 1823 . lava , sufficiently decomposed to allow of the growth of 12 On the ...
Page 15
... feet . The Puy de Dôme , the hill to which I allude , is of a conical form , and remark- able for the distinctness of its outline , rising abruptly from the midst of a sort of amphitheatre of volcanic rocks , which it considerably ...
... feet . The Puy de Dôme , the hill to which I allude , is of a conical form , and remark- able for the distinctness of its outline , rising abruptly from the midst of a sort of amphitheatre of volcanic rocks , which it considerably ...
Page 25
... feet above the level of the sea . Though its shape at a distance corresponds more to what we observe in many transition districts , yet it appears to be entirely of volcanic origin , and two distinct classes of rocks , both referable to ...
... feet above the level of the sea . Though its shape at a distance corresponds more to what we observe in many transition districts , yet it appears to be entirely of volcanic origin , and two distinct classes of rocks , both referable to ...
Page 28
... feet , which , from its conical form , and the analogy which the substances composing it bear to the pro- ducts of recent volcanos , seem to be more modern than the surrounding country . This fact however does not affect the question ...
... feet , which , from its conical form , and the analogy which the substances composing it bear to the pro- ducts of recent volcanos , seem to be more modern than the surrounding country . This fact however does not affect the question ...
Page 36
... feet . * It is curious that the same tapering figure which we view with surprise in the Alps , and consider as characteristic of rocks of the most compact texture , should in this instance be found belonging to a stratum consisting of ...
... feet . * It is curious that the same tapering figure which we view with surprise in the Alps , and consider as characteristic of rocks of the most compact texture , should in this instance be found belonging to a stratum consisting of ...
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Common terms and phrases
alluded analogy antient appear augite Auvergne basalt beds Breislac Buch calcareous called carbonic acid cause cavities cellular characters colour compact composed cones conglomerate conical consider consist containing covered crater crystals dykes earth earthquakes ejected eruption Etna exhalations existence feet felspar fire formation formed former fragments geological glassy felspar granite heat hills hornblende Humboldt Hungary igneous Ischia island lake latter lava leucite likewise limestone Lipari mass Memoir midst miles minerals modern Mount Mount Etna mountain muriatic Naples nature neighbourhood noticed observed obsidian occur origin period phænomena phænomenon Phlegrean fields pitchstone porphyry portion present probably pumice remarks respect rise Santorino scoriæ scoriform seems seen Sicily side Solfatara spot stone Strabo strata stream of lava structure Styria substance sulphur sulphuretted hydrogen summit supposed surface tain tertiary thrown tion trachyte tuff valley vapours Vesuvius vitreous volcanic action volcanic matter volcanic products volcanic rocks whilst δε
Popular passages
Page 279 - Behold, I am against thee, O destroying mountain, saith the Lord, which destroyest all the earth: and I will stretch out mine hand upon thee, and roll thee down from the rocks, and will make thee a burnt mountain.
Page 326 - The sides of the gulf before us, although composed of different strata of ancient lava, were perpendicular for about 400 feet, and rose from a wide horizontal ledge of solid black lava of irregular breadth, but extending completely round. Beneath this ledge the sides sloped gradually towards the burning lake, which was, as nearly as we could judge, 300 or 400 feet lower. It was evident, that the large crater had been recently filled with liquid lava up to this black ledge, and had, by some subterranean...
Page 322 - From midnight till the evening of the llth, they continued without intermission ; after that time their violence moderated, and they were heard only at intervals, but the explosions did not cease entirely till the 15th of July. Of all the villages round Tomboro, Tempo, containing about forty inhabitants, is the only one remaining. In Pekate...
Page 325 - The bottom was covered with lava, and the south-west and northern parts of it were one vast flood of burning matter, in a state of terrific ebullition, rolling to and fro its " fiery surge
Page 278 - Oh that thou wouldest rend the heavens, that thou wouldest come down, that the mountains might flow down at thy presence. As when the melting fire burneth, the fire causeth the waters to boil, to make thy name known to thine adversaries, that the nations may tremble at thy presence...
Page 325 - ... and flaming billows. Fifty-one conical islands, of varied form and size, containing so many craters, rose either round the edge or from the surface of the burning lake. Twenty-two constantly emitted columns of grey smoke, or pyramids of brilliant flame : and several of these at the same time vomited from their ignited mouths streams of lava, which rolled in blazing torrents down their black indented sides into the boiling mass below.
Page 337 - A vast plain extends from the hills of Aguasarco, to near the villages of Teipa and Petatlan, both equally celebrated for their fine plantations of cotton. This plain, between...
Page 129 - ... inquit >frondoso vertice collem/ - quis deus, incertum est - habitat deus...
Page 324 - ... feet below its original level. The surface of this plain was uneven, and strewed over with large stones and volcanic rocks, and in the centre of it was the great crater, at the distance of a mile and a half from the precipice on which we were standing.
Page 191 - Wheb a shock is felt, when the earth is shaken on it-s old foundations, which we had deemed so stable, one instant is sufficient to destroy long illusions. It is like awakening from a dream; but a painful awakening.