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" ... impossibility that distinct organic tissues may be found in the Laurentian graphite, if formed from land-plants, more especially if any plants existed at that time having true woody or vascular tissues ; but it cannot with certainty be affirmed that... "
Transactions and Proceedings of the Botanical Society of Edinburgh - Стр. 160
авторы: Botanical Society of Edinburgh - 1879
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The Quarterly Journal of the Geological Society of London, Том 26

Geological Society of London - 1870 - Страниц: 940
...but it cannot with certainty be afBrmed that such tissues have been found. It is possible, however, that in the Laurentian period the vegetation of the...or of our being able to distinguish the remains of land-plants from those of Algse. We may sum up these facts and considerations in the following statements...
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Life's Dawn on Earth: Being the History of the Oldest Known Fossil Remains ...

Sir John William Dawson - 1875 - Страниц: 278
...but it cannot with certainty be affirmed that such tissues have been found. It is possible, however, that in the Laurentian period the vegetation of the land may have consisted wholly * Acadian Geology, p. 535. In calcified specimens the structures remain in the graphite after decalcification...
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Life's dawn on earth, the history of the oldest known fossil remains

sir John William Dawson - 1875 - Страниц: 290
...but it cannot with certainty be affirmed that such tissues have been found. It is possible, however, that in the Laurentian period the vegetation of the land may have consisted wholly * Acadian Geology, p. 635. In calcified specimens the structures remain in the graphite after decalcification...
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Life's Dawn on Earth: Being the History of the Oldest Known Fossil Remains ...

Sir John William Dawson - 1875 - Страниц: 278
...but it cannot with certainty be affirmed that such tissues have been found. It is possible, however, that in the Laurentian period the vegetation of the land may have consisted wholly * Acadian Geology, p. 535. In calcified specimens the structures remain in the graphite after decalcification...
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Canadian Naturalist and Quarterly Journal of Science, Том 5

1870 - Страниц: 488
...but it cannot with certainty be affirmed that such tissues have been found. It is possible, however, that in the Laurentian period the vegetation of the...comparatively little hope of the distinct preservation of the forms or tissues, or of our being able to distinguish the remains of land-plants from those of...
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The Geological History of Plants

Sir John William Dawson - 1888 - Страниц: 422
...remain in the graphite after decalcification by an acid. have been found. It is possible, however, that in the Laurentian period the vegetation of the...or of our being able to distinguish the remains of land-plants from those of Algae. We may sum up these facts and considerations in the following statements...
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Relics of Primeval Life

Sir John William Dawson - 1897 - Страниц: 366
...but it cannot with certainty be affirmed that such tissues have been found. It is possible, however, that in the Laurentian period the vegetation of the...or of our being able to distinguish the remains of land-plants from those of Algae. The only apparent plant of the Laurentian to which a name has been...
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The Quarterly Journal of the Geological Society of London, Том 26

Geological Society of London - 1870 - Страниц: 960
...have been found. It is possible, however, that in the Laurentian period the vegetation of the hind may have consisted wholly of cellular plants, as,...or of our being able to distinguish the remains of land-plants from those of Algae. We may sum up these facts and considerations in the following statements...
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The Quarterly Journal of the Geological Society of London, Том 26

Geological Society of London - 1870 - Страниц: 944
...but it cannot with certainty be affirmed that such tissues have been found. It is possible, however, that in the Laurentian period the vegetation of the...or of our being able to distinguish the remains of land-plants from those of Algte. We may sum up these facts and considerations in the following statements...
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