| 1882 - 220 páginas
...described, can be determined only by further investigation. But the discovery in them at Baltimore, by Prof. Tyson, of stumps of cycads, would seem to bring them into near relation with the formation of Fredericksburg containing similar remains, and to favor their being referred, at least in part,... | |
| 1896 - 1020 páginas
...continuation of the Virginia formation above described can bo determined only by further investigation ; but the discovery in them at Baltimore, by Professor Tyson,...at Fredericksburg containing similar remains, and would favor their being referred, at least in part, to the horizon of the Upper Jurassic rocks. Possibly... | |
| William Barton Rogers - 1884 - 878 páginas
...described, can be determined only by further investigation. But the discovery in them at Baltimore, by Prof. Tyson, of stumps of cycads, would seem to bring them...upper Jurassic rocks. Possibly we may find here a passagegroup analogous to the Wealden of British geology. Whatever may be the result of further discovery,... | |
| William Barton Rogers - 1884 - 878 páginas
...deseribed, can be determined only by further investigation. But the discovery in them at Baltimore, by Prof. Tyson, of stumps of cycads, would seem to bring them into near relation with the formation at Frodericksburg containing similar remains, and to favor their being referred, at least in part, to... | |
| William Morris Fontaine - 1896 - 164 páginas
...continuation of the Virginia formation above described can be determined only by further investigation; but the discovery in them at Baltimore, by Professor Tyson,...at Fredericksburg containing similar remains, and would favor their being referred, at least in part, to the horizon of the Upper Jurassic rocks. Possibly... | |
| Geological Survey (U.S.) - 1896 - 1090 páginas
...continuation of the Virginia formation above described can bo determined only by further investigation; but the discovery in them at Baltimore, by Professor Tyson,...bring them into near relation with the formation at Kredericksburg containing similar remains, and would favor their being referred, at least in part,... | |
| Boston Society of Natural History - 1877 - 474 páginas
...Delaware and Maryland, but in Virginia disappears in its eastward dip beneath the Eocene tertiary. stumps of cycads, would seem to bring them into near relation with the formation at Frederieksbnrg containing similar remains, and to favor their being referred, at least in part, to... | |
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