The Geology and Extinct Volcanos of Central France |
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Page xi
... composed of those same multiplied beds of intermingled lavas and conglomerates , which these geologists persist in asserting not to have produced the mountain or its parasitic cones , which our eyes see them at work upon , but to have ...
... composed of those same multiplied beds of intermingled lavas and conglomerates , which these geologists persist in asserting not to have produced the mountain or its parasitic cones , which our eyes see them at work upon , but to have ...
Page 2
... composed of primary crystalline rocks , chiefly granite , overlapped on all sides by secondary strata belonging principally to the Jurassic system , which , at its southern extremity , attain a considerable elevation in the chain of the ...
... composed of primary crystalline rocks , chiefly granite , overlapped on all sides by secondary strata belonging principally to the Jurassic system , which , at its southern extremity , attain a considerable elevation in the chain of the ...
Page 7
... composed chiefly of pebbles of granite , gneiss , trachyte , and basalt . The substratum , wherever it shows itself , consists of nearly horizontal strata of sand , sandstone , calcareous marl , clay , or limestone , none of which ...
... composed chiefly of pebbles of granite , gneiss , trachyte , and basalt . The substratum , wherever it shows itself , consists of nearly horizontal strata of sand , sandstone , calcareous marl , clay , or limestone , none of which ...
Page 11
... composed entirely of minute river - shells of some single species - helices , mytili , planorbes , or other - united by glutinous filaments , and disposed in some sort of order around . These habitations are quitted when the insect's ...
... composed entirely of minute river - shells of some single species - helices , mytili , planorbes , or other - united by glutinous filaments , and disposed in some sort of order around . These habitations are quitted when the insect's ...
Page 17
... composed entirely of repeated strata of the freshwater limestone and marls , with the exception of a heavy capping of basalt . And in the ravines with which it is scored , sections are afforded sufficient to make it abundantly plain ...
... composed entirely of repeated strata of the freshwater limestone and marls , with the exception of a heavy capping of basalt . And in the ravines with which it is scored , sections are afforded sufficient to make it abundantly plain ...
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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...