The Geological History of PlantsD. Appleton & Company, 1892 - 294 pagini |
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Pagina 2
... occur in those places where there were extensive areas of water receiving detritus from the land . Further , as the distinction of land and water arises prima- rily from the shrinkage of the mass of the earth , and from the consequent ...
... occur in those places where there were extensive areas of water receiving detritus from the land . Further , as the distinction of land and water arises prima- rily from the shrinkage of the mass of the earth , and from the consequent ...
Pagina 10
... occur in the limestones or in their immediate vicinity , and granular varieties of the rock often contain large crystalline plates of plumbago . At other times this mineral is so finely disseminated as to give a bluish - grey colour to ...
... occur in the limestones or in their immediate vicinity , and granular varieties of the rock often contain large crystalline plates of plumbago . At other times this mineral is so finely disseminated as to give a bluish - grey colour to ...
Pagina 13
... occur in modern bituminous limestones and shales . Such bituminous veins occur in the Lower Carboniferous limestone and shale of Dorchester and Hillsborough , New Brunswick , with an arrangement very similar to that of the veins of ...
... occur in modern bituminous limestones and shales . Such bituminous veins occur in the Lower Carboniferous limestone and shale of Dorchester and Hillsborough , New Brunswick , with an arrangement very similar to that of the veins of ...
Pagina 26
... occur in formations older than those in which we first find land - plants , and that they have continued to inhabit the sea down to the present time . It is also true that the oldest of these Algae closely resemble in form plants of ...
... occur in formations older than those in which we first find land - plants , and that they have continued to inhabit the sea down to the present time . It is also true that the oldest of these Algae closely resemble in form plants of ...
Pagina 27
... 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 organic matter , the staining of the containing rock , the disappearance ...
... 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 organic matter , the staining of the containing rock , the disappearance ...
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Termeni și expresii frecvente
abundant Acrogens aërial roots 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 gymnospermous Heer hemisphere 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 vascular vegetable wood woody