Das Holstein-Interglazial von Tönisberg im Rahmen des Niederrheinischen Pleistozäns
Near the village of Tönisberg (Lower Rhine district) a new shaft penetrated the Schaephuysen hills, which is an upsqueezed terminal moraine of the Saale glaciation. It turned out that the Pleistocene amounts to almost 180 feet; from base to top it consists of Middle Middle-Terrace (Mittlere Mittelte...
| Published in: | E&G Quaternary Science Journal |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | German English |
| Published: |
Copernicus Publications
1966
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| Subjects: | |
| Online Access: | https://doi.org/10.3285/eg.17.1.01 https://doaj.org/article/085df2b90c814ade8c4268542c42bc9e |
| Summary: | Near the village of Tönisberg (Lower Rhine district) a new shaft penetrated the Schaephuysen hills, which is an upsqueezed terminal moraine of the Saale glaciation. It turned out that the Pleistocene amounts to almost 180 feet; from base to top it consists of Middle Middle-Terrace (Mittlere Mittelterrasse), Kempen-Krefeld-Beds (Holstein-Interglacial), and Lower Middle-Terrace (Untere Mittelterrasse). Pleistocene rests on marine sands of Upper Oligocene age. Within the sediments of the Middle Middle-Terrace the occurence of reworked fossils seems to be a significant character. The assemblage is composed of three major constituents: marine faunal relicts of Upper Oligocene age as well as Tertiary and Quaternary plant remains. The reworked fossils and additional features made it possible to trace the Middle Middle-Terrace farther to the north. It could be concluded that the "Moers-Beds" („Moerser Schichten") ought to be placed in the early Holstein-Interglacial. There is a gradual change from the deposits of the Middle Middle-Terrace to the interglacial sediments. Therefore the Middle Middle-Terrace can be regarded as a transitional layer between the Elster-Glacial and the Holstein-Interglacial. The great thickness of interglacial deposits is due to the upsqueezing effects of the Saale ice sheet. The interglacial sediments (sand, chalky gyttja, argillaceous peat) yielded many fossils of which the molluscs, the ostracods, and the macroscopic plant remains (mainly fruits and seeds) were studied in detail. Furthermore palynological investigations were undertaken. The samples from some new boreholes allowed comparative investigations with the „Krefeld-Beds" of the isolated hills west of Moers (Inselberge) and the „Kempen-Beds" which are distributed below the city of Krefeld. As redards fossils and stratigraphical sequence several similarities could be detected. Therefore the „Krefeld-Beds" of the Schaephuysen hills and those of Moers are regarded as time equivalents of the „Kempen-Beds". The term Kempen-Krefeld-Beds ... |
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