The Geology and Extinct Volcanos of Central France |
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Page ix
... ancient sheets of basalt crowning high mountain platforms , and contiguous lava - 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 ...
... ancient sheets of basalt crowning high mountain platforms , and contiguous lava - 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 ...
Page 3
... ancient than the carboniferous ; the Cambrian , Silurian , and Devonian series being generally absent . The coal - measures are sometimes asso- ciated with triassic strata , but much more usually with lias , and other members of the ...
... ancient than the carboniferous ; the Cambrian , Silurian , and Devonian series being generally absent . The coal - measures are sometimes asso- ciated with triassic strata , but much more usually with lias , and other members of the ...
Page 7
... ancient plain much above the level of the present one . " Many of these fragments have evidently been protected from the destruction that has involved the greater part of the forma- tion by a covering of basalt ; others owe their ...
... ancient plain much above the level of the present one . " Many of these fragments have evidently been protected from the destruction that has involved the greater part of the forma- tion by a covering of basalt ; others owe their ...
Page 31
... ancient roads in the vicinity of Rome , which are paved with polygonal slabs of lava . Upon inquiry they learnt that these stones were brought from the rock upon which the Castle of Rochemaure is built , on the opposite side of the ...
... ancient roads in the vicinity of Rome , which are paved with polygonal slabs of lava . Upon inquiry they learnt that these stones were brought from the rock upon which the Castle of Rochemaure is built , on the opposite side of the ...
Page 32
... ancient basaltic current , what he called a culot , or residuum of lava stopping up the mouth of a crater ; and he entirely neglected all observations on the mineralogical characters and distinctions of the various lavas he discovered ...
... ancient basaltic current , what he called a culot , or residuum of lava stopping up the mouth of a crater ; and he entirely neglected all observations on the mineralogical characters and distinctions of the various lavas he discovered ...
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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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