The Geology and Extinct Volcanos of Central France |
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Page xi
... cones , which our eyes see them at work upon , but to have filled some supposed pre - existing hollow , afterwards raised by some sudden and anomalous process into the form of a mountain ! It has never , of course , been denied by any ...
... cones , which our eyes see them at work upon , but to have filled some supposed pre - existing hollow , afterwards raised by some sudden and anomalous process into the form of a mountain ! It has never , of course , been denied by any ...
Page xii
... cone as having been formed in this manner . And in some such proportion , elevation , in the sense implied by the elevation - crater theorists , may be admitted to have assisted in the production of the central summits . But at a ...
... cone as having been formed in this manner . And in some such proportion , elevation , in the sense implied by the elevation - crater theorists , may be admitted to have assisted in the production of the central summits . But at a ...
Page xvii
... Cone and Basaltic Lava - current of Jaujac ( Ardèche ) .. I. Panoramic View from the Puy Girou , 6 miles South of Clermont ( Puy de Dôme ) II . General View of the Chain of Puys , from the West , above the Valley of the Sioule , near ...
... Cone and Basaltic Lava - current of Jaujac ( Ardèche ) .. I. Panoramic View from the Puy Girou , 6 miles South of Clermont ( Puy de Dôme ) II . General View of the Chain of Puys , from the West , above the Valley of the Sioule , near ...
Page 23
... cone , at least twenty miles from any calcareous rock ; the third , from granite . It is apparent from this that all have their origin in or below the granitic rocks which form the basis of the whole territory , and which include or ...
... cone , at least twenty miles from any calcareous rock ; the third , from granite . It is apparent from this that all have their origin in or below the granitic rocks which form the basis of the whole territory , and which include or ...
Page 41
... cone of eruption " in its normal form , with a " crater " or cup - shaped hollow at its summit , is the result of ... cone , the crater being a hol- low inverted cone contained within it . tion of their composition , which is betrayed by ...
... cone of eruption " in its normal form , with a " crater " or cup - shaped hollow at its summit , is the result of ... cone , the crater being a hol- low inverted cone contained within it . tion of their composition , which is betrayed by ...
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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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