The Geological History of PlantsK. Paul, Trench, 1888 - 290 pagini |
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Pagina 15
... trunks of Conifers ( Dadoxyl Quangondianum ) in which the material of the cell - wa has been converted into graphite , while their caviti have been filled with calcareous spar and quartz , t finest structures being preserved quite as ...
... trunks of Conifers ( Dadoxyl Quangondianum ) in which the material of the cell - wa has been converted into graphite , while their caviti have been filled with calcareous spar and quartz , t finest structures being preserved quite as ...
Pagina 79
... trunks , which are often found like drift - wood on modern sand- banks embedded in the Erian sandstones or limestones . It often shows its structure in the most perfect man- ner in specimens penetrated by calcite or silica , or by ...
... trunks , which are often found like drift - wood on modern sand- banks embedded in the Erian sandstones or limestones . It often shows its structure in the most perfect man- ner in specimens penetrated by calcite or silica , or by ...
Pagina 80
... trunks embedded in sand- stones and marine limestones , we may , perhaps , infer that they grew on the rising grounds of the Erian land , and that their trunks were carried by river - floods into the sea . No instance has yet certainly ...
... trunks embedded in sand- stones and marine limestones , we may , perhaps , infer that they grew on the rising grounds of the Erian land , and that their trunks were carried by river - floods into the sea . No instance has yet certainly ...
Pagina 91
... trunks surrounded by aërial roots , which I have described as Psaronius textilis and P. Erianus , in my " Revision ... Trunk from two to three * Abstract in “ Proceedings of the Royal Society , ” May , 1870 ; also " Report on Erian ...
... trunks surrounded by aërial roots , which I have described as Psaronius textilis and P. Erianus , in my " Revision ... Trunk from two to three * Abstract in “ Proceedings of the Royal Society , ” May , 1870 ; also " Report on Erian ...
Pagina 93
... trunks , and petioles , and pinnules of ferns are curiously dissociated in the Devonian beds —an effect of water - sorting , characteristic of a period in which the conditions of deposition were so varied . Another example of this is ...
... trunks , and petioles , and pinnules of ferns are curiously dissociated in the Devonian beds —an effect of water - sorting , characteristic of a period in which the conditions of deposition were so varied . Another example of this is ...
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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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