The Geological History of PlantsD. Appleton & Company, 1892 - 294 pagini |
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Pagina 32
... abundant in the Primordial , may , when obliged to remove , have covered the surfaces of beds of mud with vermicular markings . The third is that the Rhabdichnite - markings resemble some of the grooves in Silurian rocks which have been ...
... abundant in the Primordial , may , when obliged to remove , have covered the surfaces of beds of mud with vermicular markings . The third is that the Rhabdichnite - markings resemble some of the grooves in Silurian rocks which have been ...
Pagina 38
... abundant and very graceful plants of the early Erian , immediately after the close of the Silurian period . We come now to notice certain organisms referred to Algæ , and which are either of animal origin , or are of higher grade than ...
... abundant and very graceful plants of the early Erian , immediately after the close of the Silurian period . We come now to notice certain organisms referred to Algæ , and which are either of animal origin , or are of higher grade than ...
Pagina 47
... abundant vegetation on their shores . These were the conditions of the Eifel and Devonshire limestones , and of the Old Red Sandstone of Scotland , and the Kiltorcan beds of Ireland . In Europe also , as in America , there were in the ...
... abundant vegetation on their shores . These were the conditions of the Eifel and Devonshire limestones , and of the Old Red Sandstone of Scotland , and the Kiltorcan beds of Ireland . In Europe also , as in America , there were in the ...
Pagina 58
... abundant in the waters of the Erian and Carboniferous periods . It is still further to be observed that they are not , in the Erian beds , accompanied with any remains of woody or scalariform tissues , such as might be expected in con ...
... abundant in the waters of the Erian and Carboniferous periods . It is still further to be observed that they are not , in the Erian beds , accompanied with any remains of woody or scalariform tissues , such as might be expected in con ...
Pagina 61
... The genus is also continued , and is still more * " American Journal of Science . " Dawson , " Report on Devonian Plants , " 1870 . abundant , in the Carboniferous . Many years ago I THE ERIAN OR DEVONIAN FORESTS . 61.
... The genus is also continued , and is still more * " American Journal of Science . " Dawson , " Report on Devonian Plants , " 1870 . abundant , in the Carboniferous . Many years ago I THE ERIAN OR DEVONIAN FORESTS . 61.
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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