The Geological History of PlantsD. Appleton & Company, 1892 - 294 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- MAM 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- MAM 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 referred to in a ...
... 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 referred to in a ...
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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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