The Geology and Extinct Volcanos of Central France |
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Page vi
... strata . For this purpose , in the beginning of June , 1821 , I established myself at Clermont , the capital of the department of the Puy de Dôme , and passed some months in continual examination of the geology of the neighbourhood ...
... strata . For this purpose , in the beginning of June , 1821 , I established myself at Clermont , the capital of the department of the Puy de Dôme , and passed some months in continual examination of the geology of the neighbourhood ...
Page 2
... strata belonging principally to the Jurassic system , which , at its southern extremity , attain a considerable elevation in the chain of the Cevennes . Abstraction is in this description made of the volcanic products which rise , like ...
... strata belonging principally to the Jurassic system , which , at its southern extremity , attain a considerable elevation in the chain of the Cevennes . Abstraction is in this description made of the volcanic products which rise , like ...
Page 3
... strata more ancient than the carboniferous ; the Cambrian , Silurian , and Devonian series being generally absent . The coal - measures are sometimes asso- ciated with triassic strata , but much more usually with lias , and other ...
... strata more ancient than the carboniferous ; the Cambrian , Silurian , and Devonian series being generally absent . The coal - measures are sometimes asso- ciated with triassic strata , but much more usually with lias , and other ...
Page 4
... strata , belonging to the lias and oolite group , embraces ( as has been before observed ) the whole granitic platform like a frame ; on its southern border especially , these calcareous rocks assume a remarkable develop- ment , forming ...
... strata , belonging to the lias and oolite group , embraces ( as has been before observed ) the whole granitic platform like a frame ; on its southern border especially , these calcareous rocks assume a remarkable develop- ment , forming ...
Page 6
... strata of clay , marl , limestone , and sandstone , fre- quently containing the remains of numerous species of fresh- water mollusks , under such circumstances as to show that they were deposited for the most part in tranquillity along ...
... strata of clay , marl , limestone , and sandstone , fre- quently containing the remains of numerous species of fresh- water mollusks , under such circumstances as to show that they were deposited for the most part in tranquillity along ...
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Common terms and phrases
Allier appears Ardèche augite Auvergne basaltic currents basaltic lava base basin bed of basalt beneath breccia calcareous calcareous peperino Cantal cellular Central France chain of puys channel character Clermont clinkstone colour columnar compact composed conglomerate considerable contains covered crater crystals of augite current of lava deposits distance district domite dyke east elevation eruption evidently excavation feet felspar fissures flowed formed fragments freshwater formation geologists Gergovia gneiss granitic platform Graveneire Haute Loire heights hill 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 prisms probably Puy de Dôme puzzolana Ramond recent remarkable ridge rise river sandstone scoriæ seen side similar Sioule slope strata stream of lava substance summit surface tertiary thick tion torrents trachyte tuff valley vast vent Vivarais volcanic cones