The Geology and Extinct Volcanos of Central France |
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Page ix
... rise to them have been maturely studied under every shape , and then applied with strict impartiality to explain the appearances in question ; and until , after a close investigation , and the most liberal allowance for all possible ...
... rise to them have been maturely studied under every shape , and then applied with strict impartiality to explain the appearances in question ; and until , after a close investigation , and the most liberal allowance for all possible ...
Page 1
... rise with a gradual slope , so as to form an inclined plane , which progressively acquires an elevation of more than 3000 feet above the sea in the Auvergne and Forèz , and a still greater in the Gevaudan and Vivarais , where it reaches ...
... rise with a gradual slope , so as to form an inclined plane , which progressively acquires an elevation of more than 3000 feet above the sea in the Auvergne and Forèz , and a still greater in the Gevaudan and Vivarais , where it reaches ...
Page 2
... rise , like enormous protuberances , from the higher parts of the elevated granitic platform . It is also deeply indented by the valleys of the upper Loire and Allier . These , on some points , acquire considerable width ; the first in ...
... rise , like enormous protuberances , from the higher parts of the elevated granitic platform . It is also deeply indented by the valleys of the upper Loire and Allier . These , on some points , acquire considerable width ; the first in ...
Page 7
... rise from the plain , generally connected more or less with the granite ranges on either 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 ...
... rise from the plain , generally connected more or less with the granite ranges on either 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 ...
Page 10
... rise to the quartzose grits and con- glomerates before mentioned , would , by the reduction of the same materials into powder or fine mud , and the decomposition of their felspar , mica , and hornblende , produce aluminous clay , and ...
... rise to the quartzose grits and con- glomerates before mentioned , would , by the reduction of the same materials into powder or fine mud , and the decomposition of their felspar , mica , and hornblende , produce aluminous clay , and ...
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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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