Volume 1

Principles of geology, being an attempt to explain the former changes of the earth's surface, by reference to causes now in operation / By Charles Lyell, esq.

  • Lyell, Charles, Sir, 1797-1875.
Date:
1830-1833
Catalogue details

Licence: Public Domain Mark

Credit: Principles of geology, being an attempt to explain the former changes of the earth's surface, by reference to causes now in operation / By Charles Lyell, esq. Source: Wellcome Collection.

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    PAGE —Excavation of a cluirch under lava—Series of subterranean caverns— Linear direction of cones formed in 1811 and 1819—Flood produced in 1755 by the melting of snow during an eruption—A glacier covered by a lava- stream on Etna—Volcanic eruptions in Iceland—New island thrown up in 1783—Two lava-currents of Skaptar Jokul in the same yeai*—Their immense volume—Eruption of Jorullo in Mexico—-Humboldt’s Theory respecting the convexity of the Plain of Malpais . , , , 361 CHAPTER XXII. Volcanic Archipelagos—The Canaries—Eruptions of the Peak of TenerifFe —Cones thrown up in Lancerote in 1730-36—Pretended distinction between ancient and modern lavas—Recent formation of oolitic travertine in Lan¬ cerote—Grecian Archipelago—Santorin and its contiguous isles—Von Buch’s Theory of “Elevation Craters” considered—New islands thrown up in the Gulf of Santorin—Supposed “ Crater of Elevation ” in the Isle of Palma—Description of the Caldera of Palma—Barren island in the Bay of Bengal—Origin of the deep gorge on the side of “Elevation Craters”— Stratification of submarine volcanic products—Causes of the great size of the craters of submarine volcanos—Cone of Somma, formed in the same manner as that of Vesuvius—Mineral composition of volcanic products—■ Speculations respecting the nature of igneous rocks produced at great depths, by modern volcanic eruptions ..... 380 CHAPTER XXIII. Earthquakes and their effects—Deficiency of ancient accounts—Ordinary atmospheric phenomena—Changes produced by earthquakes in modern times considered in chronological order—Earthquake in Murcia, 1829—Bogota in 1827—Chili in 1822—Great extent of country elevated—Aleppo in 1822— Ionian Isles in 1820—Island of Sumbawa in 1815—Town of Tomboro sub¬ merged—Earthquake of Cutch in 1819—Subsidence of the delta of the Indus—Earthquake of Caraccas in 1812—South Carolina in 1811—Geo¬ graphical changes in the valley of the Mississippi—Volcanic convulsions in the Aleutian Islands in 1806—Reflections on the earthquakes of the eight- teenth century—Earthquake in Quito, 1797—Cumana, 1797—Caraccas, 1790—Sicily, 1790—Java, 1786—Sinking down of large tracts . 398 CHAPTER XXIV. Earthquake in Calabria, February 5th, 1783—Shocks continued to the end of the year 1786—Authorities—Extent of the area convulsed—Geological