The Geology and Extinct Volcanos of Central France |
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Page 2
... sides by secondary strata belonging principally to the Jurassic system , which , at its southern extremity , attain a considerable elevation in the chain of the Cevennes . Abstraction is in this description made of the volcanic products ...
... sides by secondary strata belonging principally to the Jurassic system , which , at its southern extremity , attain a considerable elevation in the chain of the Cevennes . Abstraction is in this description made of the volcanic products ...
Page 7
... side . They were very justly described by M. Ramond , writing in 1815 , † as " scattered relics of a series of beds which once covered the actual surface of the valley , and constituted an ancient plain much above the level of the ...
... side . They were very justly described by M. Ramond , writing in 1815 , † as " scattered relics of a series of beds which once covered the actual surface of the valley , and constituted an ancient plain much above the level of the ...
Page 17
... peperino . This hill also is capped by an enormous platform of basalt and another thick bed of the same rock crops out from the side of C : the hill about a hundred feet lower , the interval CHAP . II . 17 CALCAREO - VOLCANIC STRATA .
... peperino . This hill also is capped by an enormous platform of basalt and another thick bed of the same rock crops out from the side of C : the hill about a hundred feet lower , the interval CHAP . II . 17 CALCAREO - VOLCANIC STRATA .
Page 20
... side of the Allier above Vayre , the first relay on the post- ing - road from Clermont to Le Puy , are similar examples of amorphous masses of calcareous peperino traversed by vertical dykes of basalt . The latter hill is connected by ...
... side of the Allier above Vayre , the first relay on the post- ing - road from Clermont to Le Puy , are similar examples of amorphous masses of calcareous peperino traversed by vertical dykes of basalt . The latter hill is connected by ...
Page 23
... sides of this river , and for a considerable distance down the gorge it flows in , are seen colossal fragments of calcareous travertin , which by their position prove this mineral spring to have once erected a bridge similar to that of ...
... sides of this river , and for a considerable distance down the gorge it flows in , are seen colossal fragments of calcareous travertin , which by their position prove this mineral spring to have once erected a bridge similar to that of ...
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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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