The Geology and Extinct Volcanos of Central France |
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Page x
... rivers , acting slowly and gradually , but through periods of immeasurable duration , upon the surface of supra - marine land . * The edition of this Memoir printed in 1826 soon became exhausted . I was , however , unwilling to reprint ...
... rivers , acting slowly and gradually , but through periods of immeasurable duration , upon the surface of supra - marine land . * The edition of this Memoir printed in 1826 soon became exhausted . I was , however , unwilling to reprint ...
Page 1
... river , in the departments Drôme , Isère , and Hautes Alpes . On the south - west also this high ground rapidly descends through broken and irregular embranchments to the basin of the Gironde . It may , in fact , be considered as a ...
... river , in the departments Drôme , Isère , and Hautes Alpes . On the south - west also this high ground rapidly descends through broken and irregular embranchments to the basin of the Gironde . It may , in fact , be considered as a ...
Page 4
... river that flows at the bottom of each . The stratification being nearly horizontal , though dipping to the south or south - west , this formation exhibits a series of flat - topped hills bounded by perpendicular cliffs 600 or 800 feet ...
... river that flows at the bottom of each . The stratification being nearly horizontal , though dipping to the south or south - west , this formation exhibits a series of flat - topped hills bounded by perpendicular cliffs 600 or 800 feet ...
Page 7
... river and the Allier to the neighbourhood of Roanne . The 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 ...
... river and the Allier to the neighbourhood of Roanne . The 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 ...
Page 11
... river - shells of some single species - helices , mytili , planorbes , or other - united by glutinous filaments ... rivers or marshes frequented by them , heaps of such empty cases may be observed . If we suppose them in this state to be ...
... river - shells of some single species - helices , mytili , planorbes , or other - united by glutinous filaments ... rivers or marshes frequented by them , heaps of such empty cases may be observed . If we suppose them in this state to be ...
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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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