The Geological History of PlantsK. Paul, Trench, 1888 - 290 pagini |
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Pagina 11
... described by Sir W. E. Logan as the Green Lake limestone . It was estimated to amount , with some thin interstratified bands of gneiss , to a thickness of six hundred feet or more , and was found to be filled with disseminated crys ...
... described by Sir W. E. Logan as the Green Lake limestone . It was estimated to amount , with some thin interstratified bands of gneiss , to a thickness of six hundred feet or more , and was found to be filled with disseminated crys ...
Pagina 21
... described , in " The Journal of the Geo- logical Society , " of London , a remark- able tree from the Lower Erian of Gaspé , under the name Prototaxites , but for which I now prefer the name Nematophy- ton . When in Lon- FIG . 1 ...
... described , in " The Journal of the Geo- logical Society , " of London , a remark- able tree from the Lower Erian of Gaspé , under the name Prototaxites , but for which I now prefer the name Nematophy- ton . When in Lon- FIG . 1 ...
Pagina 23
... described from the Erian of Thuringia , under the name Aporoxylon . Later examples of more lax tissues from branches or young stems , and the elaborate examinations kindly undertaken for me by Professor Penhallow and * FIG . 4 ...
... described from the Erian of Thuringia , under the name Aporoxylon . Later examples of more lax tissues from branches or young stems , and the elaborate examinations kindly undertaken for me by Professor Penhallow and * FIG . 4 ...
Pagina 25
... described a tree from the Clinton . group of the United States , with large ovate leaf - bases , to which he has given the name Glyptodendron . † If the markings on these plants are really leaf - bases , they can scarcely have been ...
... described a tree from the Clinton . group of the United States , with large ovate leaf - bases , to which he has given the name Glyptodendron . † If the markings on these plants are really leaf - bases , they can scarcely have been ...
Pagina 30
... described as Rusophycus by Hall , and which are probably burrows or resting - places of crustaceans . The tracks of such animals , when walk- ing , are the jointed impressions known as Arthrophycus and Crusiana . I have shown by the ...
... described as Rusophycus by Hall , and which are probably burrows or resting - places of crustaceans . The tracks of such animals , when walk- ing , are the jointed impressions known as Arthrophycus and Crusiana . I have shown by the ...
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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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