The Geological History of PlantsD. Appleton, 1888 - 290 pagini |
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Pagina 7
... belong to this group . On referring to the geological table , it will be seen that there is a certain rough correspondence between the order of rank of plants and the order of their appearance in time . The oldest plants that we ...
... belong to this group . On referring to the geological table , it will be seen that there is a certain rough correspondence between the order of rank of plants and the order of their appearance in time . The oldest plants that we ...
Pagina 30
... belong to im- pressions explicable by the trails of drifting sea - weeds , the tail - markings of Crustacea , and the ruts ploughed by bivalve mollusks , and occurring in the Silu- rian , Erian , and Carboniferous rocks . † Among these ...
... belong to im- pressions explicable by the trails of drifting sea - weeds , the tail - markings of Crustacea , and the ruts ploughed by bivalve mollusks , and occurring in the Silu- rian , Erian , and Carboniferous rocks . † Among these ...
Pagina 57
... belong- ing to the Upper Erian . The recurrence of similar forms in the Tasmanite and white coal of Tasmania and Aus- tralia is another important fact of distribution . To this * Traquaria is to be distinguished from the calcareous ...
... belong- ing to the Upper Erian . The recurrence of similar forms in the Tasmanite and white coal of Tasmania and Aus- tralia is another important fact of distribution . To this * Traquaria is to be distinguished from the calcareous ...
Pagina 62
... belong to a plant so humble in its affinities is one of the strange anomalies presented by the old world , and of which we shall find many similar instances . The fruit of Spheno- phyllum was borne in spikes , with little whorls of ...
... belong to a plant so humble in its affinities is one of the strange anomalies presented by the old world , and of which we shall find many similar instances . The fruit of Spheno- phyllum was borne in spikes , with little whorls of ...
Pagina 72
... belong to sev- eral of the genera found in the Carboniferous , though some are peculiar to the Erian . Of the latter , the best known are per- haps those of the genus Archa- opteris ( Fig . 24 ) , so abundant in the plant - beds of ...
... belong to sev- eral of the genera found in the Carboniferous , though some are peculiar to the Erian . Of the latter , the best known are per- haps those of the genus Archa- opteris ( Fig . 24 ) , so abundant in the plant - beds of ...
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Termeni și expresii frecvente
abundant Acrogens 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 Heer hemisphere Illustrations 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 Upper Erian vascular vegetable wood woody