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 5
... whilst another described the very craters from whence the lava was ejected . || Our information with regard to the volcanic rocks of the Vicentin , of Sicily , and even of the country round Naples , was at that time still more imperfect ...
... whilst another described the very craters from whence the lava was ejected . || Our information with regard to the volcanic rocks of the Vicentin , of Sicily , and even of the country round Naples , was at that time still more imperfect ...
Page 7
... whilst the latter retains its original colour after being fused . As the only essential ingredient therefore of trachyte appears to be felspar , whereas basalt always contains augite , I shall , in speaking of volcanic products , use ...
... whilst the latter retains its original colour after being fused . As the only essential ingredient therefore of trachyte appears to be felspar , whereas basalt always contains augite , I shall , in speaking of volcanic products , use ...
Page 11
... whilst the other takes the direction of a place called Tournebise , reaches the village of Mont Gibaud , and terminates like the other , by flowing into the bed of the river , about three miles lower down . A torrent of this description ...
... whilst the other takes the direction of a place called Tournebise , reaches the village of Mont Gibaud , and terminates like the other , by flowing into the bed of the river , about three miles lower down . A torrent of this description ...
Page 12
... whilst the fourth was perhaps broken away by the stream of lava which descended from that quarter . The Coulée is easily followed with the eye along the valley as far as the lake , in consequence of the irregularities of its surface ...
... whilst the fourth was perhaps broken away by the stream of lava which descended from that quarter . The Coulée is easily followed with the eye along the valley as far as the lake , in consequence of the irregularities of its surface ...
Page 17
... whilst it serves to explain its own for- mation , may perhaps furnish us with a clue to the theory of the Puy de Dôme , and the other mountains similarly con- stituted . Encompassed on all sides by volcanic rocks , and bearing in ...
... whilst it serves to explain its own for- mation , may perhaps furnish us with a clue to the theory of the Puy de Dôme , and the other mountains similarly con- stituted . Encompassed on all sides by volcanic rocks , and bearing in ...
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Common terms and phrases
alluded analogy antient appear augite Auvergne basalt beds Breislac Buch calcareous carbonic acid cause cavities cellular characters colour compact composed cones conglomerate consider consist contains covered crater deposited dykes earth earthquakes ejected eruption Etna exhalations existence feet felspar fire formation formed former fragments glassy felspar granite heat hills hornblende Humboldt Hungary igneous island lake latter lava leucite likewise limestone Lipari Macaluba mass Memoir mica midst miles minerals Monte Mount Mount Etna Mount Vultur mountain muriatic Naples nature neighbourhood noticed observed obsidian occur origin period phænomenon Phlegrean fields pitchstone porphyry portion present probably pumice remark respect rise scoriæ scoriform seems seen shew shewn Sicily side Solfatara spot stone Strabo strata stream of lava structure 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 279 - And Abraham gat up early in the morning to the place where he stood before the LORD : and he looked toward Sodom and Gomorrah, and toward all the land of the plain, and beheld, and, lo, the smoke of the country went up as the smoke of a furnace.
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 326 - It was evident, that the large crater had been recently filled with liquid lava up to this black ledge, and had, by some subterranean canal, emptied itself into the sea, or upon the low land on the shore.
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. Twentytwo 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 317 - ... the mountain began to give way, and the greatest part of it actually fell in,, and disappeared in the earth. At the same time a tremendous noise was heard, resembling the discharge of the heaviest cannon. Immense...
Page 278 - Who can stand before His indignation? and who can abide in the fierceness of His anger? His fury is poured out like fire, and the rocks are thrown down by Him.
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.
Page 338 - September every thing seemed to announce the complete re-establishment of tranquillity, when in the night between the 28th and '29th the horrible subterraneous noise recommenced. The affrighted Indians fled to the mountains of Aguasarco. A tract of ground from three to four square miles in extent, which goes by the name of Malpays, rose up in the shape of a bladder.