The Geological History of PlantsD. Appleton & Company, 1892 - 294 pagini |
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Pagina 3
... in one shaft sunk through the whole thickness of the earth's crust , this would be sufficient for our purpose , so far as the history of life is concerned . The evidence is similar to that obtained by Schlie- mann GEOLOGICAL CHRONOLOGY .
... in one shaft sunk through the whole thickness of the earth's crust , this would be sufficient for our purpose , so far as the history of life is concerned . The evidence is similar to that obtained by Schlie- mann GEOLOGICAL CHRONOLOGY .
Pagina 4
Sir John William Dawson. The evidence is similar to that obtained by Schlie- mann on the site of Troy , where , in digging through suc- cessive layers of débris , he found the objects deposited by successive occupants of the site , from ...
Sir John William Dawson. The evidence is similar to that obtained by Schlie- mann on the site of Troy , where , in digging through suc- cessive layers of débris , he found the objects deposited by successive occupants of the site , from ...
Pagina 11
... similar abundance at several other horizons , in beds of limestone which have been ascertained by Sir W. E. Logan to have an aggregate thickness of thirty - five hundred feet , it is * Paper by the author on Laurentian Graphite ...
... similar abundance at several other horizons , in beds of limestone which have been ascertained by Sir W. E. Logan to have an aggregate thickness of thirty - five hundred feet , it is * Paper by the author on Laurentian Graphite ...
Pagina 12
... similar areas of the Carboniferous system . It is also to be observed that an immense area in Canada appears to be occupied by these graphitic and Eozoon limestones , and that rich graphitic deposits exist in the continuation of this ...
... similar areas of the Carboniferous system . It is also to be observed that an immense area in Canada appears to be occupied by these graphitic and Eozoon limestones , and that rich graphitic deposits exist in the continuation of this ...
Pagina 13
... similar to that of the veins of graphite ; and in the Que- bec rocks of Point Levi , veins attaining to a thickness of more than a foot , are filled with a coaly matter having a transverse columnar structure , and regarded by Logan and ...
... similar to that of the veins of graphite ; and in the Que- bec rocks of Point Levi , veins attaining to a thickness of more than a foot , are filled with a coaly matter having a transverse columnar structure , and regarded by Logan and ...
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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