The Geology and Extinct Volcanos of Central France |
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Page 1
... lower Loire . South of this line the surface continues to 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 ...
... lower Loire . South of this line the surface continues to 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 ...
Page 7
... lower levels of this great valley- plain are for the most part superficially covered with alluvium , composed chiefly of pebbles of granite , gneiss , trachyte , and basalt . The substratum , wherever it shows itself , consists of ...
... lower levels of this great valley- plain are for the most part superficially covered with alluvium , composed chiefly of pebbles of granite , gneiss , trachyte , and basalt . The substratum , wherever it shows itself , consists of ...
Page 13
... Lower Miocene ) , and cannot be divided into periods by reason of their palæontological characters , since the same species are found in the oldest as in the most recent beds of this formation . Whatever differences occur are such only ...
... Lower Miocene ) , and cannot be divided into periods by reason of their palæontological characters , since the same species are found in the oldest as in the most recent beds of this formation . Whatever differences occur are such only ...
Page 14
... lower ones of the Miocene , has , I have reason to believe , made up his mind to consider them as of the age of the latter division of the tertiary series . * These remarks refer , of course , to the lacustrine strata alone of the ...
... lower ones of the Miocene , has , I have reason to believe , made up his mind to consider them as of the age of the latter division of the tertiary series . * These remarks refer , of course , to the lacustrine strata alone of the ...
Page 17
... . 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 .
... . 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 .
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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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