The Geological History of PlantsK. Paul, Trench, 1888 - 290 pagini |
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Pagina 3
... deposits over the whole of the surfaces of the continents , yet if the series could be seen in one spot , say in one shaft sunk through the whole thickness of the earth's crust , this would be sufficient for our purpose , so far as the ...
... deposits over the whole of the surfaces of the continents , yet if the series could be seen in one spot , say in one shaft sunk through the whole thickness of the earth's crust , this would be sufficient for our purpose , so far as the ...
Pagina 9
... deposits of coal and bituminous matter , and we know that these have arisen from the accumulation and slow putrefaction of masses of vegetable matter . Further , in places where igneous action has affected the beds , we find that ...
... deposits of coal and bituminous matter , and we know that these have arisen from the accumulation and slow putrefaction of masses of vegetable matter . Further , in places where igneous action has affected the beds , we find that ...
Pagina 10
... deposits of plumbago generally limestones or in their immediate vicinity , a varieties of the rock often contain large cryst of plumbago . At other times this mineral disseminated as to give a bluish - grey colour stone , and the ...
... deposits of plumbago generally limestones or in their immediate vicinity , a varieties of the rock often contain large cryst of plumbago . At other times this mineral disseminated as to give a bluish - grey colour stone , and the ...
Pagina 12
... deposits exist in the continuation tem in the State of New York , while in rock be of this age near St. John , New Brunswick very thick bed of graphitic limestone , and ass it three regular beds of graphite , having a thickness of about ...
... deposits exist in the continuation tem in the State of New York , while in rock be of this age near St. John , New Brunswick very thick bed of graphitic limestone , and ass it three regular beds of graphite , having a thickness of about ...
Pagina 13
... deposits of this kin would imply the reducing and solvent action of su stances produced in the decay of plants . In this ca such great ore - beds as that of Hull , on the Ottawa , seven * p . 599 . Granby , Melbourne , Owl's Head , & c ...
... deposits of this kin would imply the reducing and solvent action of su stances produced in the decay of plants . In this ca such great ore - beds as that of Hull , on the Ottawa , seven * p . 599 . Granby , Melbourne , Owl's Head , & c ...
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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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