The Geology and Extinct Volcanos of Central France |
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... period . After my return to England , being for some time at Cambridge , I had the advantage of frequent intercourse with the late Professor E. D. Clarke , who was himself well acquainted with volcanic Italy , and Professor Sedgwick ...
... period . After my return to England , being for some time at Cambridge , I had the advantage of frequent intercourse with the late Professor E. D. Clarke , who was himself well acquainted with volcanic Italy , and Professor Sedgwick ...
Page v
... period . • After my return to England , being for some time at Cambridge , I had the advantage of frequent intercourse with the late Professor E. D. Clarke , who was himself well acquainted with volcanic Italy , and Professor Sedgwick ...
... period . • After my return to England , being for some time at Cambridge , I had the advantage of frequent intercourse with the late Professor E. D. Clarke , who was himself well acquainted with volcanic Italy , and Professor Sedgwick ...
Page x
... periods of immeasurable duration , upon the surface of supra - marine land . * The edition of this Memoir printed in 1826 soon became exhausted . I was , however , unwilling to reprint it without previously revisiting the country of ...
... periods of immeasurable duration , upon the surface of supra - marine land . * The edition of this Memoir printed in 1826 soon became exhausted . I was , however , unwilling to reprint it without previously revisiting the country of ...
Page 2
... 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 passing into gneiss , and sometimes , especially on its southern ...
... 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 passing into gneiss , and sometimes , especially on its southern ...
Page 6
... period in the tertiary æra , by as many freshwater lakes . These have left the proofs of their former existence in sedimentary strata of clay , marl , limestone , and sandstone , fre- quently containing the remains of numerous species ...
... period in the tertiary æra , by as many freshwater lakes . These have left the proofs of their former existence in sedimentary strata of clay , marl , limestone , and sandstone , fre- quently containing the remains of numerous species ...
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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...