The Geology and Extinct Volcanos of Central France |
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Page 2
... deposits of as many freshwater lakes belonging to the tertiary period , occurring severally in Auvergne , the Forèz , the Cantal , and the Velay . The granite of this district varies much in character , often within very narrow limits ...
... deposits of as many freshwater lakes belonging to the tertiary period , occurring severally in Auvergne , the Forèz , the Cantal , and the Velay . The granite of this district varies much in character , often within very narrow limits ...
Page 6
... deposits are seen almost everywhere resting against 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 ...
... deposits are seen almost everywhere resting against 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 ...
Page 9
... deposits of mineral springs . It occa- sionally contains crystallized sulphate of barytes in veins , chal- cedony , and bitumen . The most largely developed of these arenaceous beds are , however , those of red , blue , and yellow marls ...
... deposits of mineral springs . It occa- sionally contains crystallized sulphate of barytes in veins , chal- cedony , and bitumen . The most largely developed of these arenaceous beds are , however , those of red , blue , and yellow marls ...
Page 13
... deposits of white , soft , foliated marls , that are found the remains not only of mollusks , but also of the vertebrated animals , of which a very copious cata- logue has been published by M. Pomel . * Carnivora , Insectivora ...
... deposits of white , soft , foliated marls , that are found the remains not only of mollusks , but also of the vertebrated animals , of which a very copious cata- logue has been published by M. Pomel . * Carnivora , Insectivora ...
Page 14
... deposits of the Limagne with other well - known tertiary formations , M. Pomel exhibits more doubt , but on the whole concludes from palæontological evidence that they may be con- sidered as parallel to the fossiliferous beds of Mayence ...
... deposits of the Limagne with other well - known tertiary formations , M. Pomel exhibits more doubt , but on the whole concludes from palæontological evidence that they may be con- sidered as parallel to the fossiliferous beds of Mayence ...
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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 mass 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 cones