The Geology and Extinct Volcanos of Central FranceJ. Murray, 1858 - 258 pages |
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Page xii
... crater theorists , may be admitted to have assisted in the production of the central summits . But at a distance from these few dykes are found , and there is no reason to doubt that the great bulk of such mountains owes in every case ...
... crater theorists , may be admitted to have assisted in the production of the central summits . But at a distance from these few dykes are found , and there is no reason to doubt that the great bulk of such mountains owes in every case ...
Page 30
... crater , without dreaming of their neighbourhood to a volcano which was to give the first notice of its existence by burying them under the products of its eruptions . The Catanians regarded as fables all relations of the former ...
... crater , without dreaming of their neighbourhood to a volcano which was to give the first notice of its existence by burying them under the products of its eruptions . The Catanians regarded as fables all relations of the former ...
Page 31
... crater , convinced them of the truth of their conjec- tures , and they loudly proclaimed the interesting discovery . On their return to Paris M. Guettard published a Memoir announcing the existence of volcanic remains in Auvergne ...
... crater , convinced them of the truth of their conjec- tures , and they loudly proclaimed the interesting discovery . On their return to Paris M. Guettard published a Memoir announcing the existence of volcanic remains in Auvergne ...
Page 32
... crater , every mass of basalt for a volcano , and saw nothing but decomposed lavas in beds of marl and sandstone . M. Des- marest's maps were astonishingly accurate , and evinced a very close and conscientious study of the localities ...
... crater , every mass of basalt for a volcano , and saw nothing but decomposed lavas in beds of marl and sandstone . M. Des- marest's maps were astonishingly accurate , and evinced a very close and conscientious study of the localities ...
Page 41
... crater " or cup - shaped hollow at its summit , is the result of the accumulation round the volcanic orifice or vent of the scoriæ and other fragmentary matters pro- jected into the air by the series of ex- plosive discharges of elastic ...
... crater " or cup - shaped hollow at its summit , is the result of the accumulation round the volcanic orifice or vent of the scoriæ and other fragmentary matters pro- jected into the air by the series of ex- plosive discharges of elastic ...
Autres éditions - Tout afficher
The Geology and Extinct Volcanos of Central France George Poulett Scrope Affichage du livre entier - 1858 |
The Geology and Extinct Volcanos of Central France George Poulett Scrope Affichage du livre entier - 1858 |
The Geology and Extinct Volcanos of Central France George Poulett Scrope Affichage du livre entier - 1858 |
Expressions et termes fréquents
Allier ancient appears Ardèche augite Auvergne basin bed of basalt breccia calcareous calcareous peperino Cantal cellular Central France chain of puys channel character Clermont clinkstone colour columnar compact conglomerate considerable contains covered crater Crown 8vo current of lava deposits distance district domite dyke east Edition elevation eruption evidently excavation Fcap feet felspar fissures flowed formed fragments freshwater formation geologists Gergovia gneiss granitic platform Graveneire Haute Loire heights hill Illustrations lacustrine lake lava lava-current Le Puy Limagne limestone marls mass matter Mezen miles Mont Dore Monts Dôme mountain neighbouring numerous observed occupied olivine Pariou peperino plain Plate plateau points Pomel Pont Portrait Post 8vo prisms probably Puy de Dôme recent remarkable ridge rise river rock sandstone scoriæ side Sioule slope strata stream of lava substance summit surface tertiary thick tion trachyte tuff valley vent Vivarais volcanic cones Vols Woodcuts
Fréquemment cités
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Page 206 - ... been completed. There was first a period when the spacious lakes, of which we still may trace the boundaries, lay at the foot of mountains of moderate elevation, unbroken by the bold peaks and precipices of Mont d'Or, and unadorned by the picturesque outline of the Puy de Dome, or of the volcanic cones and craters now covering the granitic platform. During this earlier scene of repose, deltas were slowly formed ; beds of marl and sand several hundred feet thick deposited; siliceous and calcareous...