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Dinoflagellate Zonation of the Uppermost Paleocene? to Lower Miocene in the Wursterheide Research Well, NW Germany
| Heilmann-Clausen, C. and Costa, L.I. | |
| 1989 | |
| Geologisches Jahrbuch A vol.111 pp.431-521 figs.5 pl.21 tbls.1 | |
| Dinoflagellate Zonation of the Uppermost Paleocene? to Lower Miocene in the Wursterheide Research Well, NW Germany |
Heilmann-Clausen, C. and Costa, L.I. (1989); Dinoflagellate Zonation of the Uppermost Paleocene? to Lower Miocene in the Wursterheide Research Well, NW Germany; Geologisches Jahrbuch A 111, p.431-521, 5 fig., 1 tab., 21 pl. Abstract: The quantitative distribution of organic-walled microplankton, mainly dinoflagellates, in cores (762.0 m - 330.8 m) from the Wursterheide research well, NW Germany, is described. The dinoflagellate assemblages are interpreted in terms of standard dinoflagellate zones (D-Zones). Deposits in adjoining regions of the NW European Tertiary Basin are correlated to the sequence studied. The correlation includes the London Clay and Bracklesham Beds of Southern and Eastern England, the Ieper, Vlierzele, Brussel and Lede Formation in the Belgian Basin, the Untereozõn 1, 2, 3, 4, the Obereozõn and the Grafenberg Schichten in NW Germany and the Olst, Fur, Rosnaes Clay, Lillebaelt Clay and Sovind Marl Formations in the Danish Subbasin. The chronostratigraphy is interpreted as follows: The interval 762.0 m - 728.8 m is referred to the uppermost Paleocene or lowermost Eocene, the interval from 726.0 m and up to approximately 450 m is referred to the Lower Eocene (Ypresian sensu stricto), the interval from approx. 450 m and up to 369.8 m is interpreted as belonging in the lower part of the Middle Eocene (Lutetian), the sequence 348.0 m - 346.8 m is referred to the Upper Oligocene (Chattian), and the interval 342.0 m - 330.0 m is referred to the Lower Miocene, possibly also including a few meters of Upper Oligocene beds. Reworked Jurassic, Cretaceous and Eocene dinoflagellates occur in certain intervals in the Wursterheide section. At least two of these sequences were deposited during well documented regressive situations, namely just before the beginning and in the late Ypresian age. Several dinoflagellates, which differ from previously recognized taxa, and appear as stratigraphically useful, are described informally and illustrated in photographic plates. Four new subspecies of dinoflagellates are formally described.