The Geology and Extinct Volcanos of Central France |
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Page xi
... 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 filled some supposed pre - existing ...
... 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 filled some supposed pre - existing ...
Page 7
... beds which once covered the actual surface of the valley , and constituted an 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 ...
... beds which once covered the actual surface of the valley , and constituted an 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 ...
Page 8
... beds are usually found to lean against the granite , sometimes at a considerable angle . The principal divisions of the lacustrine series may be classed as - 1st , grit and conglomerate , associated with red , blue , and white marls and ...
... beds are usually found to lean against the granite , sometimes at a considerable angle . The principal divisions of the lacustrine series may be classed as - 1st , grit and conglomerate , associated with red , blue , and white marls and ...
Page 9
... beds of limestone resembling the Italian travertin or the 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 ...
... beds of limestone resembling the Italian travertin or the 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 ...
Page 10
... beds of an oolitic limestone resembling our Bath stone in colour and struc- ture , and , like it , acquiring greater hardness on exposure to the air . At Gannat and elsewhere this rock contains land - shells and bones of quadrupeds and ...
... beds of an oolitic limestone resembling our Bath stone in colour and struc- ture , and , like it , acquiring greater hardness on exposure to the air . At Gannat and elsewhere this rock contains land - shells and bones of quadrupeds and ...
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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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