The Geological History of PlantsK. Paul, Trench, 1888 - 290 pagini |
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Pagina 2
... remains of anima which they contain ; all these appearances i each successive bed must have been the su was covered by the next . As these beds of rock were mostly formed and of material derived from the waste of not universal , but ...
... remains of anima which they contain ; all these appearances i each successive bed must have been the su was covered by the next . As these beds of rock were mostly formed and of material derived from the waste of not universal , but ...
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 14
... remains . It is true that , in certain bitum and limestones of the Silurian system , shred tissue can sometimes be detected , and in so in the Lower Silurian limestone of the La Clo ains in Canada , the pores of brachiopodous the cells ...
... remains . It is true that , in certain bitum and limestones of the Silurian system , shred tissue can sometimes be detected , and in so in the Lower Silurian limestone of the La Clo ains in Canada , the pores of brachiopodous the cells ...
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 ...
Pagina 21
... remains go , they indicate the presence of the families of Rhizo- carps and of Lyco- pods . If we ascend into the Upper Si- lurian , or Siluri- an proper , the evi- dences of land veg- etation somewhat increase . In 1859 I described ...
... remains go , they indicate the presence of the families of Rhizo- carps and of Lyco- pods . If we ascend into the Upper Si- lurian , or Siluri- an proper , the evi- dences of land veg- etation somewhat increase . In 1859 I described ...
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Termeni și expresii frecvente
acrogens aërial roots Algæ allied America appear arctic areoles bark beds belong bituminous branches Brongniart bundles Calamites Canada Carboniferous Caulopteris cells cellular character climate coal coal-formation conifers Cordaites cycads cylinder Dadoxylon Dawson Demy 8vo described Devonian diameter Eocene Erian Europe exogenous Fcap ferns flora formation forms fossil plants fronds fructification fruit Gaspé genera genus Geological Society graphite Greenland hemisphere Illustrations Journal Laramie Laurentian leaf-bases leaf-scars leaves Lepidodendron Lepidophloios Lesquereux limestone Lower Carboniferous Lycopods macrospores medullary rays Mesozoic Middle modern Nova Scotia occur outer Paleozoic period Permian petioles pines pinnate pinnules pith present probably Prof Psilophyton referred resemble Rhizocarps ribbed rocks sandstones scalariform scars Second Edition Sequoia shales Sigillaria Silurian similar Small crown 8vo species specimens Sphenophyllum Sporangites spore-cases spores sporocarps stems Sternbergia structure Tertiary thick Third Edition tion tissue tree-ferns trees trunks Upper Cretaceous vascular vegetable vols Williamson wood woody
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