The Geology and Extinct Volcanos of Central France |
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Page xi
... extremity by the two last - named authorities , it in fact denies a volcano to be eruptive at all , that is to say , to be productive of any appreciable amount of lava or fragmentary matter ; since such products , if they really ...
... extremity by the two last - named authorities , it in fact denies a volcano to be eruptive at all , that is to say , to be productive of any appreciable amount of lava or fragmentary matter ; since such products , if they really ...
Page 2
... extremity , attain a considerable elevation in the chain of the Cevennes . Abstraction is in this description made of the volcanic products which rise , like enormous protuberances , from the higher parts of the elevated granitic ...
... extremity , attain a considerable elevation in the chain of the Cevennes . Abstraction is in this description made of the volcanic products which rise , like enormous protuberances , from the higher parts of the elevated granitic ...
Page 15
... extremity of the exposed cliff , as if they had been deposited in a hollow , or perhaps subjected to some amount of disturbance since their deposition . * In which case likewise " it seems as if there had been time for each suc- cessive ...
... extremity of the exposed cliff , as if they had been deposited in a hollow , or perhaps subjected to some amount of disturbance since their deposition . * In which case likewise " it seems as if there had been time for each suc- cessive ...
Page 64
... extremity of the lava - current . The various rills which drain the valley of Durtol and its embranchments , have recovered their pristine channel , and , filtering through the scori- form masses which always form the lowest surface of ...
... extremity of the lava - current . The various rills which drain the valley of Durtol and its embranchments , have recovered their pristine channel , and , filtering through the scori- form masses which always form the lowest surface of ...
Page 77
... extremity the whole river gushes forth near the villages of Sayat and St. Vincent , in the most abundant and fertilizing springs of the country . This basalt encloses numerous crystals of augite and olivine , with a few of felspar and ...
... extremity the whole river gushes forth near the villages of Sayat and St. Vincent , in the most abundant and fertilizing springs of the country . This basalt encloses numerous crystals of augite and olivine , with a few of felspar 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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