The Geology and Extinct Volcanos of Central France |
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Page xvi
... Valleys- Human Bones in Volcanic Tuff - Volcanos of the Haut Vivarais . CHAPTER IX . .. 197 CONCLUDING REMARKS Age of Volcanic Rocks - Gradual Excavation of Valleys - Original limits of Lake - basins - Probable ... Valley xvi CONTENTS .
... Valleys- Human Bones in Volcanic Tuff - Volcanos of the Haut Vivarais . CHAPTER IX . .. 197 CONCLUDING REMARKS Age of Volcanic Rocks - Gradual Excavation of Valleys - Original limits of Lake - basins - Probable ... Valley xvi CONTENTS .
Page xvii
... Valley of Montpezat ( Ardêche ) XV . La Coupe d'Ayzac ( Ardêche ) XVII . Profiles and Sections , & c . .. XIII . Volcanic Cone and Basaltic Lava - current of Jaujac ( Ardèche ) .. I. Panoramic View from the Puy Girou , 6 miles South of ...
... Valley of Montpezat ( Ardêche ) XV . La Coupe d'Ayzac ( Ardêche ) XVII . Profiles and Sections , & c . .. XIII . Volcanic Cone and Basaltic Lava - current of Jaujac ( Ardèche ) .. I. Panoramic View from the Puy Girou , 6 miles South of ...
Page 1
... valley of the Rhone , which , running nearly due north and south , separates it from the ranges east of that river , in the departments Drôme , Isère , and Hautes Alpes . On the south - west also this high ground rapidly descends ...
... valley of the Rhone , which , running nearly due north and south , separates it from the ranges east of that river , in the departments Drôme , Isère , and Hautes Alpes . On the south - west also this high ground rapidly descends ...
Page 7
... valley of the Loire from the junction of that river and the Allier to the neighbourhood of Roanne . The lower levels of this great valley- plain are for the most part superficially covered with alluvium , composed chiefly of pebbles of ...
... valley of the Loire from the junction of that river and the Allier to the neighbourhood of Roanne . The lower levels of this great valley- plain are for the most part superficially covered with alluvium , composed chiefly of pebbles of ...
Page 23
... valley , since the source itself is elevated more than 100 feet above the river . It is worthy of remark that the three springs mentioned above , whose deposits are , except in a greater or less proportion of iron , exactly alike , rise ...
... valley , since the source itself is elevated more than 100 feet above the river . It is worthy of remark that the three springs mentioned above , whose deposits are , except in a greater or less proportion of iron , exactly alike , rise ...
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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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Page 206 - ... been completed. There was first a period when the spacious lakes, of which we still may trace the boundaries, lay at the foot of mountains of moderate elevation, unbroken by the bold peaks and precipices of Mont d'Or, and unadorned by the picturesque outline of the Puy de Dome, or of the volcanic cones and craters now covering the granitic platform. During this earlier scene of repose, deltas were slowly formed ; beds of marl and sand several hundred feet thick deposited; siliceous and calcareous...