Stratigraphy of a combined wave- and tide-dominated intertidal sand body: Martens Plate, East Frisian Wadden Sea, Germany
Davis, R.A.; Flemming, B.W. (1995). Stratigraphy of a combined wave- and tide-dominated intertidal sand body: Martens Plate, East Frisian Wadden Sea, Germany, in: Flemming, B.W. et al. (Ed.) Tidal Signatures in Modern and Ancient Sediments. Special Publication of the International Association of Sedimentologists, 24: pp. 121-132 In: Flemming, B.W.; Bartholomä, A. (Ed.) (1995). Tidal Signatures in Modern and Ancient Sediments. Special Publication of the International Association of Sedimentologists, 24. Blackwell Science: Oxford. ISBN 0-86542-978-2. 358 pp., more In: Special Publication of the International Association of Sedimentologists. Blackwell: Oxford. ISSN 0141-3600; e-ISSN 2054-6610, more |
| Authors | | Top | - Davis, R.A.
- Flemming, B.W.
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| Abstract | Intertidal sand bodies are generally assumed to be tide-dominated, especially those in meso- to macrotidal settings. Vibracores ranging in length from 1.4 to 4.6 m recovered from Martens Plate, an intertidal sand body situated landward of the mesotidal Harle inlet in the East Frisian Wadden Sea of Germany, show a near equal mixture of wave- and tide-dominated sedimentary structures. The sediments of the cores are dominated by well-sorted fine sand, typically containing less than 2% mud. Bioturbation is not conspicuous throughout the cores, although the tidal Oats arc in places abundantly populated by the tube-forming polychaetes Arenicola marina and Lanice conchilega. Physical sedimentary structures include parallel lamination, small-scale ripple cross-stratification and mesoscale cross-bedding. Tidal bedding and tidal bundles can be recognized within several of the cores. The core data are consistent with physical surface structures observed on the present tidal Oat/channel margin complex where the intertidal Oat surface is dominated by wave-generated structures, whereas the channels and channel margins are dominated by current-generated bedforms. It is concluded that it would be difficult to associate depositional sequences observed in the rock record with depositional environments corresponding to the specific backbarrier settings of sand bodies such as Martens Plate. |
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