The Geology and Extinct Volcanos of Central France |
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Page 2
... granite , overlapped on all sides by secondary strata belonging principally to the Jurassic system , which , at its southern extremity , attain a considerable elevation in the chain of the Cevennes . Abstraction is in this description ...
... granite , overlapped on all sides by secondary strata belonging principally to the Jurassic system , which , at its southern extremity , attain a considerable elevation in the chain of the Cevennes . Abstraction is in this description ...
Page 3
... granite round Ardes ( Puy de Dôme ) and Massiac ( Cantal ) , and the mica - schist of the Lozère , are rich in antimony . Copper is rare , but some veins in the Aveyron are supposed to have been anciently worked by the English when they ...
... granite round Ardes ( Puy de Dôme ) and Massiac ( Cantal ) , and the mica - schist of the Lozère , are rich in antimony . Copper is rare , but some veins in the Aveyron are supposed to have been anciently worked by the English when they ...
Page 6
... granite ranges which , no doubt , formed their shores . The accompany- ing map marks with sufficient accuracy the general disposition and limits of these lacustrine formations . I. LACUSTRINE FORMATION OF THE LIMAGNE D'AUVERGNE . The ...
... granite ranges which , no doubt , formed their shores . The accompany- ing map marks with sufficient accuracy the general disposition and limits of these lacustrine formations . I. LACUSTRINE FORMATION OF THE LIMAGNE D'AUVERGNE . The ...
Page 7
... granite , gneiss , trachyte , and basalt . The substratum , wherever it shows itself , consists of nearly horizontal strata of sand , sandstone , calcareous marl , clay , or limestone , none of which observe a fixed and invariable order ...
... granite , gneiss , trachyte , and basalt . The substratum , wherever it shows itself , consists of nearly horizontal strata of sand , sandstone , calcareous marl , clay , or limestone , none of which observe a fixed and invariable order ...
Page 8
... granite ranges , but are in general separated from them by shallow trans- verse valleys , so that the precise junction of the two formations is not often observable . But where this can be seen the lowest arenaceous beds are usually ...
... granite ranges , but are in general separated from them by shallow trans- verse valleys , so that the precise junction of the two formations is not often observable . But where this can be seen the lowest arenaceous beds are usually ...
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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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