The Geological History of PlantsD. Appleton & Company, 1892 - 294 pagini |
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Pagina
... DEVONIAN . SILURIAN . VASCULAR PHAENOGAMS . GYMNOSPERMS . ANGIOSPERMS . FERNS EQUISETINERE LYCOPODINER CYCADACER CONIFERA MONOCOTYLEDONS DICOTYLEDONS CAMBRIAN . LAURENTIAN , & c DIAGRAM OF THE HISTORY OF PLANTS IN GEOLOGICAL TIME ...
... DEVONIAN . SILURIAN . VASCULAR PHAENOGAMS . GYMNOSPERMS . ANGIOSPERMS . FERNS EQUISETINERE LYCOPODINER CYCADACER CONIFERA MONOCOTYLEDONS DICOTYLEDONS CAMBRIAN . LAURENTIAN , & c DIAGRAM OF THE HISTORY OF PLANTS IN GEOLOGICAL TIME ...
Pagina
... DEVONIAN FORESTS - ORIGIN OF PETROLEUM - THE AGE OF ACROGENS AND GYMNOSPERMS CHAPTER IV . THE CARBONIFEROUS FLORA - CULMINATION OF THE ACROGENS - FOR- MATION OF COAL PAGE 1 8 45 • 110 CHAPTER V. THE FLORA OF THE EARLY MESOZOIC - REIGN ...
... DEVONIAN FORESTS - ORIGIN OF PETROLEUM - THE AGE OF ACROGENS AND GYMNOSPERMS CHAPTER IV . THE CARBONIFEROUS FLORA - CULMINATION OF THE ACROGENS - FOR- MATION OF COAL PAGE 1 8 45 • 110 CHAPTER V. THE FLORA OF THE EARLY MESOZOIC - REIGN ...
Pagina 13
... Devonian bituminous shales and limestones have been metamorphosed and converted into graphitic rocks not very dissimilar to those in the less altered portions of the Laurentian . In like manner it seems probable that the numerous ...
... Devonian bituminous shales and limestones have been metamorphosed and converted into graphitic rocks not very dissimilar to those in the less altered portions of the Laurentian . In like manner it seems probable that the numerous ...
Pagina 15
... Devonian shales of St. John , in the state of graphite ; and in the same formation there are trunks of Conifers ( Dadoxylon Ouangondianum ) in which the material of the cell - walls has been converted into graphite , while their ...
... Devonian shales of St. John , in the state of graphite ; and in the same formation there are trunks of Conifers ( Dadoxylon Ouangondianum ) in which the material of the cell - walls has been converted into graphite , while their ...
Pagina 16
... Devonian of Gaspé , when he met the late Professor Agassiz , and remarked that the specimen was the re- mains of a Devonian tree contemporaneous with his fishes of that age . " How I wish I 16 THE GEOLOGICAL HISTORY OF PLANTS .
... Devonian of Gaspé , when he met the late Professor Agassiz , and remarked that the specimen was the re- mains of a Devonian tree contemporaneous with his fishes of that age . " How I wish I 16 THE GEOLOGICAL HISTORY OF PLANTS .
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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