The Geology and Extinct Volcanos of Central FranceJ. Murray, 1858 - 258 psl. |
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42 psl.
... lava , lapillo , and puzzolana , with occasional fragments of domite and granite . Their form is more or less that ... stream of lava ; but the bases of the cones being sometimes partially cultivated , or covered with forests , it is ...
... lava , lapillo , and puzzolana , with occasional fragments of domite and granite . Their form is more or less that ... stream of lava ; but the bases of the cones being sometimes partially cultivated , or covered with forests , it is ...
55 psl.
... stream of basaltic lava called the Cheire de l'Aumône takes its rise , and extends to a considerable distance over the slope of the granitic platform , but is at length lost under a cultivated soil , or confounded with other and ...
... stream of basaltic lava called the Cheire de l'Aumône takes its rise , and extends to a considerable distance over the slope of the granitic platform , but is at length lost under a cultivated soil , or confounded with other and ...
56 psl.
... stream of lava ; which , instead of issuing from either crater , takes its rise at the western base of the hill . At no great distance from its source the lava encountered an angular protuberance of granite , which evidently caused the ...
... stream of lava ; which , instead of issuing from either crater , takes its rise at the western base of the hill . At no great distance from its source the lava encountered an angular protuberance of granite , which evidently caused the ...
58 psl.
George Poulett Scrope. In one part of this new channel , where the valley has a slight ... lava is about fifty feet high , and the columnar division is prolonged ... stream towards the north , and stopped where the village of Mazayes now ...
George Poulett Scrope. In one part of this new channel , where the valley has a slight ... lava is about fifty feet high , and the columnar division is prolonged ... stream towards the north , and stopped where the village of Mazayes now ...
59 psl.
... stream about three miles above their former confluence . A considerable body of back - water still remained behind in the part of the valley of the Sioule intercepted between the dyke of lava and the emissory thus forcibly created ...
... stream about three miles above their former confluence . A considerable body of back - water still remained behind in the part of the valley of the Sioule intercepted between the dyke of lava and the emissory thus forcibly created ...
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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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206 psl. - ... 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...