The Geology and Extinct Volcanos of Central France |
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Page 2
... sandstone occur within this district , seeming to have been deposited in hollows or estuaries of the original island of primary rocks . And there are vestiges of four geographic- ally distinct deposits of as many freshwater lakes ...
... sandstone occur within this district , seeming to have been deposited in hollows or estuaries of the original island of primary rocks . And there are vestiges of four geographic- ally distinct deposits of as many freshwater lakes ...
Page 3
... sandstone , probably Devonian , and accompanied with anthracite , has been penetrated by a large outburst of red porphyry , the entire region of Central France contains , I believe , scarcely any sedimentary strata more ancient than the ...
... sandstone , probably Devonian , and accompanied with anthracite , has been penetrated by a large outburst of red porphyry , the entire region of Central France contains , I believe , scarcely any sedimentary strata more ancient than the ...
Page 5
... by blue schistose marls or sandstone , and occasionally by magnesian limestone , especially in the departments of Dordogne , Lot , and Aveyron . CHAPTER II . TERTIARY FORMATIONS . SOME three or four CHAP . I. 5 SECONDARY FORMATIONS .
... by blue schistose marls or sandstone , and occasionally by magnesian limestone , especially in the departments of Dordogne , Lot , and Aveyron . CHAPTER II . TERTIARY FORMATIONS . SOME three or four CHAP . I. 5 SECONDARY FORMATIONS .
Page 6
... sandstone , fre- quently containing the remains of numerous species of fresh- water mollusks , under such circumstances as to show that they were deposited for the most part in tranquillity along the shores and at the bottom of these ...
... sandstone , fre- quently containing the remains of numerous species of fresh- water mollusks , under such circumstances as to show that they were deposited for the most part in tranquillity along the shores and at the bottom of these ...
Page 7
... sandstone , calcareous marl , clay , or limestone , none of which observe a fixed and invariable order of superposition . Several hills also composed of the same strata rise from the plain , generally connected more or less with the ...
... sandstone , calcareous marl , clay , or limestone , none of which observe a fixed and invariable order of superposition . Several hills also composed of the same strata rise from the plain , generally connected more or less with the ...
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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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