The Geological History of PlantsD. Appleton & Company, 1892 - 294 pagini |
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Pagina 8
... possibly the land were already tenanted by living beings . The great beds of limestone which exist in this part of the system furnish one indication of this . In the later geological formations the limestones are mostly or- ganic - that ...
... possibly the land were already tenanted by living beings . The great beds of limestone which exist in this part of the system furnish one indication of this . In the later geological formations the limestones are mostly or- ganic - that ...
Pagina 24
... possibly survivors of that prototypal flora to which I have already referred . They are trees of large size , with a coaly bark and large spreading roots , having the surface of the stem smooth or irregularly ribbed , but with a nodose ...
... possibly survivors of that prototypal flora to which I have already referred . They are trees of large size , with a coaly bark and large spreading roots , having the surface of the stem smooth or irregularly ribbed , but with a nodose ...
Pagina 31
... forms , their want of nodes or append-. FIG . 9. Astropolithon Hindii , an organism of the Lower Cain- brian of Nova Scotia , possibly vegetable . FIG . 10. - Carboniferous rill- mark ( Nova Scotia. LAURENTIAN AND . EARLY PALEOZOIC . 31.
... forms , their want of nodes or append-. FIG . 9. Astropolithon Hindii , an organism of the Lower Cain- brian of Nova Scotia , possibly vegetable . FIG . 10. - Carboniferous rill- mark ( Nova Scotia. LAURENTIAN AND . EARLY PALEOZOIC . 31.
Pagina 32
... possibly be referred to the feet or spinous tails of swimming crustaceans . Salter has already suggested this origin for some scratches of somewhat different form found in the Primordial of Great Britain . He supposed them to have been ...
... possibly be referred to the feet or spinous tails of swimming crustaceans . Salter has already suggested this origin for some scratches of somewhat different form found in the Primordial of Great Britain . He supposed them to have been ...
Pagina 41
... possibly with broad , flabby leaves , mostly cellu- lar in texture , and resembling Algæ transferred to the air . Imagination can , however , scarcely realise this strange and grotesque vegetation , which , though possibly copious and ...
... possibly with broad , flabby leaves , mostly cellu- lar in texture , and resembling Algæ transferred to the air . Imagination can , however , scarcely realise this strange and grotesque vegetation , which , though possibly copious and ...
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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