The Geological History of PlantsD. Appleton & Company, 1892 - 294 pagini |
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Pagina 7
... appear very early . Next in order we find forests in which gigantic Ferns and Lycopods and Mare's - tails predominate , and are associated with pines . Succeeding these we have a reign of Gym- nosperms , and in the later formations we ...
... appear very early . Next in order we find forests in which gigantic Ferns and Lycopods and Mare's - tails predominate , and are associated with pines . Succeeding these we have a reign of Gym- nosperms , and in the later formations we ...
Pagina 11
... appears in the excavation made by the quarrymen , it resembled a bed of coal ; and a block from this bed , about four feet thick , was a prominent object in the Canadian department of the Colonial Exhibition of 1886 . When it is ...
... appears in the excavation made by the quarrymen , it resembled a bed of coal ; and a block from this bed , about four feet thick , was a prominent object in the Canadian department of the Colonial Exhibition of 1886 . When it is ...
Pagina 12
... 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 , New ...
... 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 , New ...
Pagina 15
... appear to be fibrous structures , which I believe may indicate the existence of land - plants . This graphite is composed of contorted and slickensided laminæ , much like those of some bituminous shales and coarse coals ; and in these ...
... appear to be fibrous structures , which I believe may indicate the existence of land - plants . This graphite is composed of contorted and slickensided laminæ , much like those of some bituminous shales and coarse coals ; and in these ...
Pagina 19
... appear to advance in evidences of plant - life . The Huronian age , which succeeded the Laurentian , seems to have been a disturbed and unquiet time , and , except in certain bands of iron - ore and some dark slates coloured with ...
... appear to advance in evidences of plant - life . The Huronian age , which succeeded the Laurentian , seems to have been a disturbed and unquiet time , and , except in certain bands of iron - ore and some dark slates coloured with ...
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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