The Geological History of PlantsD. Appleton & Company, 1892 - 294 pagini |
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Pagina 9
... Canada more especially the deposits are very considerable . The graphite of the Laurentian of Canada occurs both in beds and in veins , and in such a manner as to show that its origin and deposition are contemporaneous with 66 those of ...
... Canada more especially the deposits are very considerable . The graphite of the Laurentian of Canada occurs both in beds and in veins , and in such a manner as to show that its origin and deposition are contemporaneous with 66 those of ...
Pagina 10
... derived 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 .
... derived 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 .
Pagina 11
... Canadian department of the Colonial Exhibition of 1886 . When it is considered that graphite occurs in similar abundance at several other horizons , in beds of limestone which have been ascertained by Sir W. E. Logan to have an ...
... Canadian department of the Colonial Exhibition of 1886 . When it is considered that graphite occurs in similar abundance at several other horizons , in beds of limestone which have been ascertained by Sir W. E. Logan to have an ...
Pagina 12
... Canada appears to be occupied by these graphitic and Eozoon limestones , and that rich graphitic deposits exist in the continuation of this sys- tem in the State of New York , while in rocks believed to be of this age near St. John ...
... Canada appears to be occupied by these graphitic and Eozoon limestones , and that rich graphitic deposits exist in the continuation of this sys- tem in the State of New York , while in rocks believed to be of this age near St. John ...
Pagina 13
... Canada in which Silu- rian and Devonian bituminous shales and limestones have been metamorphosed and converted into graphitic rocks not very dissimilar to those in the less altered portions of the Laurentian . In like manner it seems ...
... Canada in which Silu- rian and Devonian bituminous shales and limestones have been metamorphosed and converted into graphitic rocks not very dissimilar to those in the less altered portions of the Laurentian . In like manner it seems ...
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Termeni și expresii frecvente
abundant Acrogens aërial roots Algæ allied America animal appear arctic areoles bark beds belong bituminous branches Brongniart Calamites Canada carbon Carboniferous Caulopteris cellular character clay climate coal coal-formation conifers Cordaites cycads Dadoxylon Dawson deposits described Devonian diameter dicotyledonous Eocene Europe exogenous fact ferns flora formation forms fossil fossil plants fronds fructification fruit Gaspé genera genus Geological Society graphite Greenland gymnospermous Heer hemisphere Journal known land land-plants Laramie Laurentian leaf-bases leaf-scars leaves Lepidodendron Lepidophloios Lesquereux limestone Lower Carboniferous Lycopods macrospores matter medullary rays Mesozoic Miocene modern Nematophyton northern Nova Scotia occur outer Palæozoic period Permian pines pinnules pith present preserved probably Prof Psilophyton referred remarkable resemble Rhizocarps rocks sandstones scalariform scars Sequoia shales Sigillaria Silurian similar species specimens Sphenophyllum Sporangites spore-cases spores sporocarps stems Sternbergia structure surface Tertiary thick tion tissue tree-ferns trees trunks types Upper Cretaceous vascular vegetable wood woody