The Geological History of PlantsK. Paul, Trench, 1888 - 290 pagini |
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Pagina 8
... representing perhaps the earliest rocks produ earth had ceased to be a molten mass , are th talline , and much - contorted rocks named by W. E. Logan Laurentian , and which are large in the northern parts of North America and in many ...
... representing perhaps the earliest rocks produ earth had ceased to be a molten mass , are th talline , and much - contorted rocks named by W. E. Logan Laurentian , and which are large in the northern parts of North America and in many ...
Pagina 22
... represented in Figs . 2 , 3 , 4 , w 0 : 000 FIG . 3. - Nematophyton Logani ( magnified ) . Horizontal part of one of the radial spaces , with tubes passing of fossil taxine woods , mineralised after long in water , I was inclined to ...
... represented in Figs . 2 , 3 , 4 , w 0 : 000 FIG . 3. - Nematophyton Logani ( magnified ) . Horizontal part of one of the radial spaces , with tubes passing of fossil taxine woods , mineralised after long in water , I was inclined to ...
Pagina 27
... representing their organic matter , and this is the more likely to occur in their case , as organic matters buried in marine deposits and not exposed to atmospheric oxidation are very likely to be preserved . 2. In the absence of ...
... representing their organic matter , and this is the more likely to occur in their case , as organic matters buried in marine deposits and not exposed to atmospheric oxidation are very likely to be preserved . 2. In the absence of ...
Pagina 36
... represents a broader and more frondose type of distinctly carbonaceous character . It may be described as follows : Buthotrephis Grantii , S. N. ( Fig . 13 ) .- Stems and * Appendix , p . 676 , edition of 1878 . fronds smooth and ...
... represents a broader and more frondose type of distinctly carbonaceous character . It may be described as follows : Buthotrephis Grantii , S. N. ( Fig . 13 ) .- Stems and * Appendix , p . 676 , edition of 1878 . fronds smooth and ...
Pagina 42
... , but tortuous . On the external surface of some specimens these radial spaces are represented by minute pits irregu- larly or spirally arranged . The transverse swellings of the 42 THE GEOLOGICAL HISTORY OF PLANTS .
... , but tortuous . On the external surface of some specimens these radial spaces are represented by minute pits irregu- larly or spirally arranged . The transverse swellings of the 42 THE GEOLOGICAL HISTORY OF PLANTS .
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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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