The Geological History of PlantsD. Appleton & Company, 1892 - 294 pagini |
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Pagina
... Megalopteris Calamites Asterophyllites Dadoxylon • • 21 22 , 23 28 28 • 29 · 30 • 31 . · 33 34 36 • 37 · 40 49 · • 54 62 , 63 64 , 66 • 65 66 72 , 73 • 74 75 · 76 77 78 79 Cordaites Erian Fruits • Foliage from the Coal - formation.
... Megalopteris Calamites Asterophyllites Dadoxylon • • 21 22 , 23 28 28 • 29 · 30 • 31 . · 33 34 36 • 37 · 40 49 · • 54 62 , 63 64 , 66 • 65 66 72 , 73 • 74 75 · 76 77 78 79 Cordaites Erian Fruits • Foliage from the Coal - formation.
Pagina
... Coal - formation ( six Figures ) 126-129 Noeggerathia dispar 130 Cordaites . 131 Sternbergia Fruits of Cordaites , & c . Conifers of the Coal - formation ( four Species ) Trigonocarpum Walchia imbricatula Foliage of the Jurassic Period ...
... Coal - formation ( six Figures ) 126-129 Noeggerathia dispar 130 Cordaites . 131 Sternbergia Fruits of Cordaites , & c . Conifers of the Coal - formation ( four Species ) Trigonocarpum Walchia imbricatula Foliage of the Jurassic Period ...
Pagina 9
... forms known as Eozoon Canadense have been recognised in the Laurentian lime ... carbon or charcoal in the form of the sub- stance known as graphite or ... coal has been changed into anthracite and graphite , that bituminous shales ...
... forms known as Eozoon Canadense have been recognised in the Laurentian lime ... carbon or charcoal in the form of the sub- stance known as graphite or ... coal has been changed into anthracite and graphite , that bituminous shales ...
Pagina 15
... charcoal , with structure , exists in the graphitic . coal of Rhode Island . The fronds of ferns , with their minutest veins perfect , are preserved in the Devonian shales of St. John , in the state of graphite ; and in the same formation ...
... charcoal , with structure , exists in the graphitic . coal of Rhode Island . The fronds of ferns , with their minutest veins perfect , are preserved in the Devonian shales of St. John , in the state of graphite ; and in the same formation ...
Pagina 20
... coal formation . I am inclined to believe that both of Nicholson's species are parts of one plant , and for this I have proposed the generic name Protannularia ( Fig . 1 ) . Somewhat higher in the Siluro - Cambrian , in the Cincinnati ...
... coal formation . I am inclined to believe that both of Nicholson's species are parts of one plant , and for this I have proposed the generic name Protannularia ( Fig . 1 ) . Somewhat higher in the Siluro - Cambrian , in the Cincinnati ...
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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