The Geology and Extinct Volcanos of Central France |
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Page 7
... the existing river - beds . But these distinctions do not seem to me as yet well made out . † Mémoire sur le Nivellement des Monts Dômes . similar capping of horizontal strata of a hard and durable CHAP . II . LIMAGNE D'AUVERGNE .
... the existing river - beds . But these distinctions do not seem to me as yet well made out . † Mémoire sur le Nivellement des Monts Dômes . similar capping of horizontal strata of a hard and durable CHAP . II . LIMAGNE D'AUVERGNE .
Page 8
George Poulett Scrope. similar capping of horizontal strata of a hard and durable lime- stone of a stalagmitic character to be described hereafter . These hills are seldom found in immediate union with the granite ranges , but are in ...
George Poulett Scrope. similar capping of horizontal strata of a hard and durable lime- stone of a stalagmitic character to be described hereafter . These hills are seldom found in immediate union with the granite ranges , but are in ...
Page 9
... similar to these tertiary sands and marls . The calcareous element , where it occurs , was , no doubt , added from the interior of the primary crystalline rocks , whence even now issue many springs depositing large quantities of ...
... similar to these tertiary sands and marls . The calcareous element , where it occurs , was , no doubt , added from the interior of the primary crystalline rocks , whence even now issue many springs depositing large quantities of ...
Page 16
... similar to No. 1 ; some of them being ribboned with different colours , yellow , brown , or bluish - black , determined , it seems , by the greater or less pro- portion of volcanic ashes contained in their several zones . Where this ...
... similar to No. 1 ; some of them being ribboned with different colours , yellow , brown , or bluish - black , determined , it seems , by the greater or less pro- portion of volcanic ashes contained in their several zones . Where this ...
Page 17
... 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 compose far the greater part of the rock and give it the character of 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 compose far the greater part of the rock and give it the character of a ...
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Common terms and phrases
Allier appears Ardèche augite Auvergne basaltic currents basaltic lava base basin bed of basalt beneath breccia calcareous calcareous peperino Cantal cellular Central France chain of puys channel character Clermont clinkstone colour columnar compact composed conglomerate considerable contains covered crater crystals of augite current of lava deposits distance district domite dyke east elevation eruption evidently excavation feet felspar fissures flowed formed fragments freshwater formation geologists Gergovia gneiss granitic platform Graveneire Haute Loire heights hill lacustrine lake lava lava-current Le Puy Limagne limestone marls masses matter Mezen miles Mont Dore Monts Dôme mountain neighbouring numerous observed occupied olivine Pariou peperino plain Plate plateau points Pomel prisms probably Puy de Dôme puzzolana Ramond recent remarkable ridge rise river sandstone scoriæ seen side similar Sioule slope strata stream of lava substance summit surface tertiary thick tion torrents trachyte tuff valley vast vent Vivarais volcanic cone