The Geological History of PlantsD. Appleton & Company, 1892 - 294 pagini |
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Pagina 2
... remains of animals and plants which they contain ; all these appearances indicating that each successive bed must have been the surface before it was covered by the next . As these beds of rock were mostly formed under water , and of ...
... remains of animals and plants which they contain ; all these appearances indicating that each successive bed must have been the surface before it was covered by the next . As these beds of rock were mostly formed under water , and of ...
Pagina 3
... remains embedded in the several layers and placing these in chronological order , we obtain in like manner histories of animal and plant life parallel to the physical changes indicated by the beds themselves . The facts as to the ...
... remains embedded in the several layers and placing these in chronological order , we obtain in like manner histories of animal and plant life parallel to the physical changes indicated by the beds themselves . The facts as to the ...
Pagina 8
... remains of shells , corals , and other hard parts of marine animals , which are composed of calcium carbonate , which the ani- mals obtain directly from their food , and indirectly from the calcareous matter dissolved in the sea - water ...
... remains of shells , corals , and other hard parts of marine animals , which are composed of calcium carbonate , which the ani- mals obtain directly from their food , and indirectly from the calcareous matter dissolved in the sea - water ...
Pagina 14
... remains . It is true that , in certain bituminous shales and limestones of the Silurian system , shreds of organic tissue can sometimes be detected , and in some cases , as in the Lower Silurian limestone of the La Cloche Mount- ains in ...
... remains . It is true that , in certain bituminous shales and limestones of the Silurian system , shreds of organic tissue can sometimes be detected , and in some cases , as in the Lower Silurian limestone of the La Cloche Mount- ains in ...
Pagina 16
... remains of land - plants from those of Algæ . We may sum up these facts and considerations in the following statements : First , that somewhat obscure traces of organic structure can be detected in the Lauren- tian graphite ; secondly ...
... remains of land - plants from those of Algæ . We may sum up these facts and considerations in the following statements : First , that somewhat obscure traces of organic structure can be detected in the Lauren- tian graphite ; secondly ...
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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