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| Gijzel, P. van; Overweel, C.J.; Veenstra, H.J.. |
| In this article the results of a study on boulder-clay in the neighbourhood of Winschoten (N.E. Netherlands) are communicated (Chapter I). The underlying sediments of the boulder-clay in this area consist of fine preglacial sands and black clay. In the nuclei of the many drumlins a strongly ice-pushed boulder-clay may be encountered (Chapter II). Palynological analysis showed the pollen content of the boulder-clay to be very small. In a few samples more pollen was found (Plates I and II), but in these cases there appeared to be an admixture of black clay, obviously picked up by the land-ice. This black clay (the so-called potklei or pottery clay) is very humic and resembles the Lauenburg clay from Germany, but is younger. Using pollen analysis only one... |
| Tipo: Article / Letter to the editor |
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| Ano: 1959 |
URL: http://www.repository.naturalis.nl/record/505923 |
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| Overweel, C.J.. |
| Detailed indicator counts in the literature on areas south and east of the Baltic were revaluated on the basis of the main ice movement directions of the last glacial in Fennoscandia. This revaluation resulted in a distribution pattern of indicators which partially coincides with the general trends of ice movement. This holds for both the Weichselian and the Saalian. The other part of the indicator distribution is of Baltic origin. The interrelationship found between flowline and distribution pattern was further analysed and elaborated, which led to a reconstruction of the directions of ice movement and outline forms of the Scandinavian ice sheets. The peripheral glacier-margin drainage was incorporated into the reconstruction, and the resulting... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 38.10. |
| Ano: 1977 |
URL: http://www.repository.naturalis.nl/record/317398 |
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