The Geological History of PlantsK. Paul, Trench, 1888 - 290 pagini |
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Pagina 2
... matter ; and that he can sketch the present aspect of the subject , and way to new developments , which must go he shall have passed away . The subject is one which has the disadva supposing some knowledge of the geologi the earth , and ...
... matter ; and that he can sketch the present aspect of the subject , and way to new developments , which must go he shall have passed away . The subject is one which has the disadva supposing some knowledge of the geologi the earth , and ...
Pagina 8
... obtain directly from their food , and ind the calcareous matter dissolved in the sea - wat manner great beds of iron - ore exist in the. CHAPTER II VEGETATION OF THE LAURENTIAN AND EARLY PALEOZOIC-QUESTIONS AS TO ALGE.
... obtain directly from their food , and ind the calcareous matter dissolved in the sea - wat manner great beds of iron - ore exist in the. CHAPTER II VEGETATION OF THE LAURENTIAN AND EARLY PALEOZOIC-QUESTIONS AS TO ALGE.
Pagina 9
... matter . Besides this , certain forms known as Eozoon Canadense have been recognised in the Laurentian lime- stones ... matter , and we know that these have arisen from the accumulation and slow putrefaction of masses of vegetable matter ...
... matter . Besides this , certain forms known as Eozoon Canadense have been recognised in the Laurentian lime- stones ... matter , and we know that these have arisen from the accumulation and slow putrefaction of masses of vegetable matter ...
Pagina 11
... matter or muddy and sandy sediment of which these beds were originally com- posed . * The quantity of graphite in the Lower Laurentian series is enormous . Some years ago , in the township of Buckingham , on the Ottawa River , I ...
... matter or muddy and sandy sediment of which these beds were originally com- posed . * The quantity of graphite in the Lower Laurentian series is enormous . Some years ago , in the township of Buckingham , on the Ottawa River , I ...
Pagina 12
... matter of the has been accumulated in beds like those of co it has consisted of diffused bituminous matter that in more modern bituminous shales and and oil - bearing limestones . The beds of gra St. John , some of those in the gneiss ...
... matter of the has been accumulated in beds like those of co it has consisted of diffused bituminous matter that in more modern bituminous shales and and oil - bearing limestones . The beds of gra St. John , some of those in the gneiss ...
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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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