The Geology and Extinct Volcanos of Central France |
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Page 8
... continuous round the margin of the lake basin , being rather disposed here and there , like the independent deltas * For example , in the hills called les Côtes and Chanturgue near Clermont . which grow at the mouths of torrents , along ...
... continuous round the margin of the lake basin , being rather disposed here and there , like the independent deltas * For example , in the hills called les Côtes and Chanturgue near Clermont . which grow at the mouths of torrents , along ...
Page 11
... continuous beds , one over another , with layers of the foliated marls interposed . It is well known that certain varieties of the Phryganea ( or caddis - fly ) are in the habit , when in their caterpillar state , of clothing their ...
... continuous beds , one over another , with layers of the foliated marls interposed . It is well known that certain varieties of the Phryganea ( or caddis - fly ) are in the habit , when in their caterpillar state , of clothing their ...
Page 24
... continuous , sometimes in layers of con- cretionary nodules , assuming much the same forms as our flints , and , like them , having a white surface . Their substance is , however , generally more vitreous , like resinite , and often ap ...
... continuous , sometimes in layers of con- cretionary nodules , assuming much the same forms as our flints , and , like them , having a white surface . Their substance is , however , generally more vitreous , like resinite , and often ap ...
Page 25
... continuous through the intervening area . III . BASIN OF THE HAUTE LOIRE . The freshwater formation of the basin of the Upper Loire which surrounds Le Puy differs but slightly from the two already described , and , like these , has been ...
... continuous through the intervening area . III . BASIN OF THE HAUTE LOIRE . The freshwater formation of the basin of the Upper Loire which surrounds Le Puy differs but slightly from the two already described , and , like these , has been ...
Page 50
... continuous sheets or streams to a distance from its vent , like the basaltic lavas produced about the same time and from the same fissure , it has accumulated in dome and bell - shaped hillocks on the point where it was emitted . That ...
... continuous sheets or streams to a distance from its vent , like the basaltic lavas produced about the same time and from the same fissure , it has accumulated in dome and bell - shaped hillocks on the point where it was emitted . That ...
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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...