The Geological History of PlantsD. Appleton & Company, 1892 - 294 pagini |
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Pagina 190
... Laramie or Porcu- pine Hill . Fort Union group , U. S. territory . Middle Laramie or Willow Creek beds . Lower Laramie or St. Mary River . Fox Hill series . ( Danian and Senonian ) . Fort Pierre series . Middle Creta- ceous ( Tu- ronian ...
... Laramie or Porcu- pine Hill . Fort Union group , U. S. territory . Middle Laramie or Willow Creek beds . Lower Laramie or St. Mary River . Fox Hill series . ( Danian and Senonian ) . Fort Pierre series . Middle Creta- ceous ( Tu- ronian ...
Pagina 198
... are several species with immense leaves . The large leaves , known as Credneria , found in the Cenomanian. FIG . 71. - Platanus nobilis , Newberry , variety basilobata . Laramie . Much reduced . 198 THE GEOLOGICAL HISTORY OF PLANTS .
... are several species with immense leaves . The large leaves , known as Credneria , found in the Cenomanian. FIG . 71. - Platanus nobilis , Newberry , variety basilobata . Laramie . Much reduced . 198 THE GEOLOGICAL HISTORY OF PLANTS .
Pagina 202
... Laramie or in the Upper Cretaceous of British Columbia . In the paper above quoted , Newberry describes three new species from the Amboy clays , one of which he considers iden- tical with a Greenland form referred by Heer to L. Meeki of ...
... Laramie or in the Upper Cretaceous of British Columbia . In the paper above quoted , Newberry describes three new species from the Amboy clays , one of which he considers iden- tical with a Greenland form referred by Heer to L. Meeki of ...
Pagina 208
... Laramie series . These beds were deposited in fresh or brackish water , in an internal sea or group of lakes and swamps , when the continent was lower than at present . They have been studied both in the United States and Canada ; and ...
... Laramie series . These beds were deposited in fresh or brackish water , in an internal sea or group of lakes and swamps , when the continent was lower than at present . They have been studied both in the United States and Canada ; and ...
Pagina 209
... Laramie series , formerly known as the lignitic or lignite Tertiary , oc- curs , with the exception of a few outliers , in two large areas west of the 100th meridian , and separated from each other by a tract of older Cretaceous rocks ...
... Laramie series , formerly known as the lignitic or lignite Tertiary , oc- curs , with the exception of a few outliers , in two large areas west of the 100th meridian , and separated from each other by a tract of older Cretaceous rocks ...
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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