The Geology and Extinct Volcanos of Central France |
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Page ix
... streams so recent as " 1. Changes of level . " 2. The destruction of some rocks and the reproduction of others from their materials . " 3. The production of rocks de novo from the interior of the globe upon its surface . " Changes these ...
... streams so recent as " 1. Changes of level . " 2. The destruction of some rocks and the reproduction of others from their materials . " 3. The production of rocks de novo from the interior of the globe upon its surface . " Changes these ...
Page 12
... streams by which it was fed , and the cases have been drifted into the deep water , perhaps ( as is suggested by Sir Charles Lyell ) borne upon the masses of littoral reeds to which they were attached , when these were torn away from ...
... streams by which it was fed , and the cases have been drifted into the deep water , perhaps ( as is suggested by Sir Charles Lyell ) borne upon the masses of littoral reeds to which they were attached , when these were torn away from ...
Page 22
... stream it originally Flow 2 . Natural Bridge of Travertin , formed by an incrusting Spring at Clermont . flowed into , 16 feet high and 12 wide . Near it are the rudi- ments of a similar arch , the construction of which is still going ...
... stream it originally Flow 2 . Natural Bridge of Travertin , formed by an incrusting Spring at Clermont . flowed into , 16 feet high and 12 wide . Near it are the rudi- ments of a similar arch , the construction of which is still going ...
Page 37
... streams , and rivers , are cease- lessly engaged in sapping and mining their banks , and carrying off the detritus to the plains , which they cover with alluvium . This every flood drives further , and grinds still finer , until it is ...
... streams , and rivers , are cease- lessly engaged in sapping and mining their banks , and carrying off the detritus to the plains , which they cover with alluvium . This every flood drives further , and grinds still finer , until it is ...
Page 42
... stream of lava ; but the bases of the cones being sometimes partially cultivated , or covered with forests , it is impossible in every instance to discover this ; nor , for the same reasons , is it easy to trace to its source every ...
... stream of lava ; but the bases of the cones being sometimes partially cultivated , or covered with forests , it is impossible in every instance to discover this ; nor , for the same reasons , is it easy to trace to its source every ...
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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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