The Geology and Extinct Volcanos of Central France |
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Page 50
... directions which such a current could have taken , and in spite of the improbability that a rocky bed of which the Puy de Dôme , a mass rising 1600 feet above its base , is merely a detached remnant , should have left no traces of its ...
... directions which such a current could have taken , and in spite of the improbability that a rocky bed of which the Puy de Dôme , a mass rising 1600 feet above its base , is merely a detached remnant , should have left no traces of its ...
Page 55
... direction . This lava was most probably emitted at the epoch of the eruption of the Petit Dôme . 2. The Great Suchet - a saddle - shaped eminence with some slight traces of a crater on its southern slope - is connected with that last ...
... direction . This lava was most probably emitted at the epoch of the eruption of the Petit Dôme . 2. The Great Suchet - a saddle - shaped eminence with some slight traces of a crater on its southern slope - is connected with that last ...
Page 56
... direction ; and finding an issue at length between this and a granitic knoll which obstructed its progress towards the north , poured down on the present site of the castle and town of Pont Gibaud ; immediately above which it seems to ...
... direction ; and finding an issue at length between this and a granitic knoll which obstructed its progress towards the north , poured down on the present site of the castle and town of Pont Gibaud ; immediately above which it seems to ...
Page 58
... direction west - south - west , soon reached the bed of this river , about three miles above the spot of the other irruption , and pouring over its banks filled up the entire valley with an immense causeway more than 100 feet high ...
... direction west - south - west , soon reached the bed of this river , about three miles above the spot of the other irruption , and pouring over its banks filled up the entire valley with an immense causeway more than 100 feet high ...
Page 60
... direction of its rivers , where every link in the chain of causes and effects is not quite so palpable . The whole superficies of the plateau covered by the lava of Côme cannot be estimated under ten square miles . Its thickness is not ...
... direction of its rivers , where every link in the chain of causes and effects is not quite so palpable . The whole superficies of the plateau covered by the lava of Côme cannot be estimated under ten square miles . Its thickness is not ...
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Common terms and phrases
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
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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...