The Geological History of PlantsK. Paul, Trench, 1888 - 290 стор. |
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Сторінка 9
... shales have been converted into graphitic shales , and that cracks filled with soft bituminous matter have ultimately become changed into veins of graphite . When , therefore , we find in the Lau- rentian thick beds of graphite and beds ...
... shales have been converted into graphitic shales , and that cracks filled with soft bituminous matter have ultimately become changed into veins of graphite . When , therefore , we find in the Lau- rentian thick beds of graphite and beds ...
Сторінка 10
... from the bedded rocks traversed by these veins , to which it bears the same relation with the veins * " Geology of Canada , " 1863 . of bitumen found in the bituminous shales of the Car- 10 THE GEOLOGICAL HISTORY OF PLANTS .
... from the bedded rocks traversed by these veins , to which it bears the same relation with the veins * " Geology of Canada , " 1863 . of bitumen found in the bituminous shales of the Car- 10 THE GEOLOGICAL HISTORY OF PLANTS .
Сторінка 11
Sir John William Dawson. of bitumen found in the bituminous shales of the Car- boniferous and Silurian rocks . Nor can there be any doubt that the graphite found in the beds has been de- posited along with the calcareous matter or muddy ...
Sir John William Dawson. of bitumen found in the bituminous shales of the Car- boniferous and Silurian rocks . Nor can there be any doubt that the graphite found in the beds has been de- posited along with the calcareous matter or muddy ...
Сторінка 12
... shales and bituminous and oil - bearing limestones . The beds of graphite near St. John , some of those in the gneiss at Ticonderoga in New York , and at Lochaber and Buckingham , and else- where in Canada , are so pure and regular that ...
... shales and bituminous and oil - bearing limestones . The beds of graphite near St. John , some of those in the gneiss at Ticonderoga in New York , and at Lochaber and Buckingham , and else- where in Canada , are so pure and regular that ...
Сторінка 13
... shales . Such bituminous veins occur in the Lower Carboniferous limestone and shale of Dorchester and Hillsborough , New Brunswick , with an arrangement very similar to that of the veins of graphite ; and in the Que- bec rocks of Point ...
... shales . Such bituminous veins occur in the Lower Carboniferous limestone and shale of Dorchester and Hillsborough , New Brunswick , with an arrangement very similar to that of the veins of graphite ; and in the Que- bec rocks of Point ...
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Acrogens Algæ allied America appear Archæopteris arctic bark beds belong bituminous branches Calamites Canada Carboniferous Caulopteris cellular character climate coal coal-formation Cordaites Crown 8vo cycads Cyclopteris Dadoxylon Dawson Demy 8vo deposits described Devonian dicotyledons English Eocene Europe Fcap ferns Fifth Edition flora formation forms fossil plants Fourth Edition fronds Frontispiece Gaspé genera genus Geological Society graphite Greenland Heer hemisphere Illustrations India Journal land land-plants Laramie Laurentian leaf-bases leaf-scars leaves Lepidodendron Lepidophloios Lesquereux limestone Lower Carboniferous Lycopods macrospores Maps medullary rays Mesozoic Middle Miocene modern Nova Scotia occur Paleozoic period Permian pinnules Plates Post 8vo Prof Psilophyton referred Rhizocarps rocks Royal 8vo sandstones scalariform scars Second Edition Sequoia shales Sigillaria Silurian similar Small crown 8vo species specimens Sporangites spore-cases spores sporocarps stems Sternbergia structure Tertiary thick Third Edition tion tissue Translated tree-ferns trees trunks types Upper Cretaceous vascular vegetable vols wood woody
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