| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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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