The Geology and Extinct Volcanos of Central France |
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Page 2
... upper Loire and Allier . These , on some points , acquire considerable width ; the first in the basins of Montbrison and Roanne , the latter in the plain of the Limagne . Several detached basins of carboni- ferous sandstone occur within ...
... upper Loire and Allier . These , on some points , acquire considerable width ; the first in the basins of Montbrison and Roanne , the latter in the plain of the Limagne . Several detached basins of carboni- ferous sandstone occur within ...
Page 7
... upper Ter- tiary period , from its containing fewer pebbles of basalt , and generally occur- ring at higher levels , than the existing river - beds . But these distinctions do not seem to me as yet well made out . † Mémoire sur le ...
... upper Ter- tiary period , from its containing fewer pebbles of basalt , and generally occur- ring at higher levels , than the existing river - beds . But these distinctions do not seem to me as yet well made out . † Mémoire sur le ...
Page 14
... upper members of his Eocene formation , or to the lower ones of the Miocene , has , I have reason to believe , made up his mind to consider them as of the age of the latter division of the tertiary series . * These remarks refer , of ...
... upper members of his Eocene formation , or to the lower ones of the Miocene , has , I have reason to believe , made up his mind to consider them as of the age of the latter division of the tertiary series . * These remarks refer , of ...
Page 15
... upper surface of the cliff is horizontal , and formed to the depth of 8 or 10 feet of a bed of boulders exactly the same as those which the river still rolls along its bed below . The strata beneath are not completely horizontal , but ...
... upper surface of the cliff is horizontal , and formed to the depth of 8 or 10 feet of a bed of boulders exactly the same as those which the river still rolls along its bed below . The strata beneath are not completely horizontal , but ...
Page 17
... upper beds are of the concre- tionary indusial variety . The basaltic platform rests imme- diately on a thick bed which contains much volcanic matter , and is in fact a basaltic breccia , mixed with calcareous particles . It is compact ...
... upper beds are of the concre- tionary indusial variety . The basaltic platform rests imme- diately on a thick bed which contains much volcanic matter , and is in fact a basaltic breccia , mixed with calcareous particles . It is compact ...
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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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