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Translation of «Überformung» into 25 languages
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Use your subscription to unlock millions more items that ship free. Managing your Shipping Pass is easy. Look for Seeing what items qualify for 2-day shipping is easy—they're flagged with the program logo. Featured Shipping Pass Products Household. What is Shipping Pass and how will it make my life easier? Lundqvist, J. Ohnesorge, W. Range, P. Landesanstalt, Berlin. Schulz, W. Seifert, G. Strehl, E. Struck, R. The small kettle hole depression of the Niedersee reveals an excellent archive for palaeoenvironmental and palaeoclimatic reconstructions.
Here, a new research was performed which provides more detailed and precise knowledge of the local development during the Last Glacial-Interglacial Transition, because especially the Weichselian Late Glacial is completely preserved here. This led subsequently to a hiatus within the sedimentary succession in the course of the Preboreal.
Sedimentation ultimately continued during the Atlantic and ceased with the development of an alkaline fen. The combined data of the rich pollen-, micro- and macrofossil record e. Pollen, Ostracoden, Mollusken, Makroreste von Pflanzen etc. Addresses of authors: A.
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Especially the impressive scenery of the Cretaceous chalk cliff is always of particular interest. But the south-eastern cliff line of the Jasmund Peninsula between Sassnitz and Mukran reveals another specific geological feature, because several different deposits of the youngest Weichselian glaciation and the Holocene are well-exposed here. An often inspected excursion point there is the locality of the Niedersee, a classical Late Glacial site, which was already studied by Boehm-Hartmann , Krasske , and Steusloff Today, these kettle holes have been cut off by the wave activity This coastal erosion offers an insight into the history of their development.
The discovery of these kettle holes situated directly at the present cliff line took place in the s. At first, Credner detected a depression of a former lake in the upper part of the 15 m high cliff wall in , which was later called Credner See according to its discoverer. Then, also in , Thienemann found the depression of the former Mukran See at the cliff wall slightly to the north and in , together with Boehm-Hartmann, the depression of the Niedersee. The latter is located between the former depressions listed above Fig.
The German name Niedersee was derived from the low height of the cliff at this point, which is only 4 m high. In general, kettle holes are typical and frequent morphological features of the glacial topography of Jasmund. Embedded in the undulating ground moraine landscape, these small depressions exist here in great quantities.
Their formation resulted from the glacial activity during the Pomeranian and Mecklenburg phases of the Weich-. Now, based on multi-proxy studies pollen, plant macro remains, ostracods, molluscs, etc. Kettle holes were generated after the dead ice melted and the resulting depressions were often filled with water forming small lakes without outlet, of which several still exist today.
First studies on the sedimentary record of these former lakes were performed by Boehm-Hartmann pollen analyses , Steusloff molluscs and Krasske diatoms. But especially concerning the Niedersee, no modern studies about the history of this lake have been realised and published since then.
Although the sedimentary successions of these three former lakes differ in thickness and sedimentary formation, they can be partially correlated due to the occurrence of contemporaneous peat layers within their sedimentary record. The LST was also found within the Niedersee record by Kliewe , which also indicates that the sediments must be older than Holocene. Furthermore, in com-. The depression of the Niedersee Fig. Whereas up to the s the out crop of the Niedersee was easily accessible and well-preserved, the centre of the depression is now highly buried and rehydrated due to a drainage ditch of the neighbouring golf course.
Therefore, site inspection and sampling was no longer possible in this part of the depression. For these reasons, in May the two new sections could only be excavated at the still accessible southern and northern margins of the Niedersee depression. This was done vertically to the bedding to maintain sediment cores.
Consequently, three successive sediment cores with sufficient overlaps were taken from the southern margin of the Niedersee depression and later combined to a 2. The obtained sediment record was used for detailed sediment descriptions and subsequently sub-sampled for pollen analyses.
Sampling was regularly carried out every five centimetre; sampling density was sometimes adapted to the sedimentary features. A total of 45 samples each of approx. In contrast, the sedimentary succession of the 2. For recognizing siliceous materials like diatoms or for identifying the. The section of Boehm-Hartmann is here presented in a revised and modified version. Generally, a sum of up to pollen grains was counted. The pollen, spores and cysts of local components like aquatic plants, marsh plants, ferns, moss, algae as well as reworked pre-Quaternary sporomorphs are excluded from this basic sum, with the exception of the Cyperaceae.
Nonetheless, like the individual AP and NAP records these proofs are applied to the basis sum as well. The results of pollen analyses are shown in a conventional pollen diagram Fig. Rare findings of taxa are not illustrated within the pollen diagram, but will be partly mentioned in chapter 3. For extracting further macro- and microfossils e.follow site
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In contrast to the dense pollen sampling, only 21 samples M1 up to M21, see Fig. In general, sampling followed the changes in sedimentology. Correlation of samples is illustrated in Fig. Preparation of these samples was carried out at the palaeontological laboratory of the Institute of Geological Sciences of the Free University Berlin.
Synonyms and antonyms of Überformung in the German dictionary of synonyms
Fossil remains within the residues were picked out, sorted and identified using a Leica S6E and a Zeiss Axiostar plus microscope. Head capsules of chironomids, which are preserved in sediments of the Younger Dryas and the Preboreal Fig. For documentation selected specimen were mounted on stubs, sputtered with gold and examined with the aid of a Zeiss Supra 40 VP scanning electron microscope SEM.
Two radiocarbon measurements were obtained from terrestrial plant remains. Except if otherwise noted, the presented results in chapter 3 apply to the section from the southern margin of the Niedersee depression. Over relocated moraine deposits, sedimentation starts with sandy and gravely silts Fig. The first traceable pollen record is proven from these sediments and its onset is here defined as base line of the section Fig. Based on the pollen spectra composition, nine pollen zones could be recognized, which, in combination with other proxy data and AMS 14C-dating, allow for well-founded age determination.
The chronology used here. But it is contrary to the stratigraphical subdivision of the Mecklenburg-West Pomeranian Late Glacial deposits stated in Terberger et al. For detailed discussions and an evaluation of this deviant classification, and further debatable information, e. Sediments are partly calcareous. Mollusc shells, plant remains and little enrichments of humus are partly visible.
The pollen record of the lowest part of the Niedersee section 0—0. It shows high percentages of grasses and herbaceous taxa Fig. Subordinated occur yarrow Achillea , bedstraw Galium , meadow-rue Thalictrum , sunrose Helianthemum , willowherb Epilobium , breakstone Saxifraga , crowberry Empetrum , sorrel Rumex , thrift Armeria , heather Ericaceae p. Arboreal pollen are mainly dominated by pine Pinus , but these pollen stem most likely from reworked material of older Quaternary or pre-Quaternary deposits. This applies especially to the pollen of warm and temperate woody taxa such as hazel Corylus , elm Ulmus , oak Quercus , alder Alnus and hornbeam Carpinus as well.
High percentages of reworked pre-Quaternary sporomorphs in this part of the diagram support this interpretation.