The Geology and Extinct Volcanos of Central France |
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Page 3
... calcareous , coal is found in detached patches nearly all round the granitic platform , and , as already observed , on many points within its limits , especially on one straight line crossing it from north - B 2 CHAP . I. 3 GRANITIC ...
... calcareous , coal is found in detached patches nearly all round the granitic platform , and , as already observed , on many points within its limits , especially on one straight line crossing it from north - B 2 CHAP . I. 3 GRANITIC ...
Page 4
... calcareous rocks assume a remarkable develop- ment , forming a large proportion of the surface of the depart- ments Aveyron , Lozère , Gard , and Ardèche . They constitute a vast elevated platform , sloping gradually from the primary ...
... calcareous rocks assume a remarkable develop- ment , forming a large proportion of the surface of the depart- ments Aveyron , Lozère , Gard , and Ardèche . They constitute a vast elevated platform , sloping gradually from the primary ...
Page 7
... calcareous marl , clay , or limestone , none of which observe a fixed and invariable order of superposition . Several hills also composed of the same strata rise from the plain , generally connected more or less with the granite ranges ...
... calcareous marl , clay , or limestone , none of which observe a fixed and invariable order of superposition . Several hills also composed of the same strata rise from the plain , generally connected more or less with the granite ranges ...
Page 8
... calcareous strata containing freshwater shells , * and I have therefore no doubt of their belonging to the lacustrine series . They usually are seen resting directly on the granite edges of the basin , from the detritus of which they ...
... calcareous strata containing freshwater shells , * and I have therefore no doubt of their belonging to the lacustrine series . They usually are seen resting directly on the granite edges of the basin , from the detritus of which they ...
Page 9
... calcareous , and the stone more brittle . The calcareous matter sometimes is aggregated into nodular concretions , passing into solid beds of limestone resembling the Italian travertin or the deposits of mineral springs . It occa ...
... calcareous , and the stone more brittle . The calcareous matter sometimes is aggregated into nodular concretions , passing into solid beds of limestone resembling the Italian travertin or the deposits of mineral springs . It occa ...
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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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