The Geology and Extinct Volcanos of Central France |
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Page xvii
... summit of the Puy Chopine .. .. IV . Eastern View of Monts Dôme , from the Croix de Pirobot , between Volvic and Channat .. V. The Southern Chain of Puys , from the Puy de la Rodde VII . Valley of the Dordogne and Mont Dore , from the ...
... summit of the Puy Chopine .. .. IV . Eastern View of Monts Dôme , from the Croix de Pirobot , between Volvic and Channat .. V. The Southern Chain of Puys , from the Puy de la Rodde VII . Valley of the Dordogne and Mont Dore , from the ...
Page 41
... 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 vapour and gases which usually ...
... 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 vapour and gases which usually ...
Page 52
... summit gives it , when viewed from that side , somewhat of the shape of a cupola . Its appellation , how- ever ( in Latin Dumum or Podium Dumense ) , has no reference to this resemblance , but is derived from the woods with which it was ...
... summit gives it , when viewed from that side , somewhat of the shape of a cupola . Its appellation , how- ever ( in Latin Dumum or Podium Dumense ) , has no reference to this resemblance , but is derived from the woods with which it was ...
Page 53
... summit , entirely covered with thick grass , and present a smooth and gently curved outline , while that of the others is broken by rocky projections , giving them an aspect of a ruder character . The fissures of the harder portions of ...
... summit , entirely covered with thick grass , and present a smooth and gently curved outline , while that of the others is broken by rocky projections , giving them an aspect of a ruder character . The fissures of the harder portions of ...
Page 56
... summit presents two distinct and very regular craters ; one of them , with a vertical depth of 250 feet , is of considerable diameter . The cone was apparently thrown up after or during the eruption of its stream of lava ; which ...
... summit presents two distinct and very regular craters ; one of them , with a vertical depth of 250 feet , is of considerable diameter . The cone was apparently thrown up after or during the eruption of its stream of lava ; which ...
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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...