The Geology and Extinct Volcanos of Central France |
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Page viii
... numerous physical phenomena are going on at this moment on the surface of the globe , by which various changes are produced in its constitution and external character . These processes are principally : I. The atmospheric phenomena ...
... numerous physical phenomena are going on at this moment on the surface of the globe , by which various changes are produced in its constitution and external character . These processes are principally : I. The atmospheric phenomena ...
Page 6
... 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 basins , until they had accumulated to a thickness 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 basins , until they had accumulated to a thickness of ...
Page 16
... numerous shells , Planorbes , Helices , Lymnei , the shells being often replaced by bitumen , which exudes likewise from fissures in the rock . This is a very common variety of the hard lime- stone beds frequent throughout the ...
... numerous shells , Planorbes , Helices , Lymnei , the shells being often replaced by bitumen , which exudes likewise from fissures in the rock . This is a very common variety of the hard lime- stone beds frequent throughout the ...
Page 17
... numerous fragments of volcanic character . In the mountain of Gergovia a similar alternation is to be seen of beds of limestone and marls with others containing numerous fragmentary volcanic matters , often in such abundance as to ...
... numerous fragments of volcanic character . In the mountain of Gergovia a similar alternation is to be seen of beds of limestone and marls with others containing numerous fragmentary volcanic matters , often in such abundance as to ...
Page 19
... gonite , chalcedony , and numerous forms of calcareous spar , abound in the drusy and vesicular cavities and veins of both these conglomerates . C 2 The Puys de la Piquette and de Marmont , which CHAP . II . 19 CALCAREOUS PEPERINO .
... gonite , chalcedony , and numerous forms of calcareous spar , abound in the drusy and vesicular cavities and veins of both these conglomerates . C 2 The Puys de la Piquette and de Marmont , which CHAP . II . 19 CALCAREOUS PEPERINO .
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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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