Original paper
Das Ober-Maastricht von Hemmoor (N-Deutschland): Faunenzonen-Gliederung und Korrelation mit dem Ober-Maastricht von Dänemark und Limburg
Schulz, Max-Gotthard; Schmid, Friedrich
published: 12/28/1983
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ArtNo.: ESP026001301002
Abstract
The Upper Maastrichtian of Hemmoor (Lower Saxony), which here has a thickness of 85 m, is subdivided into four faunal zones (Figs. 1 and 2): Upper Upper Maastrichtian: 4. Zone of Tylocidaris baltica and Oxytoma danica. Lower Upper Maastrichtian: 3. Zone of Oxytoma danica and Tenuipteria argentea. 2. Zone of Tenuipteria argentea and Belemnitella junior. 1. Zone of Spyridoceramus tegulatus and Belemnitella junior. Since Belemnella casimirovensis has not been found, the base of the Upper Upper Maastrichtian is defined by the first appearance of Tylocidaris baltica in accordance with the subdivision of the Maastrichtian currently used in Denmark. The marker horizon for the boundary between Lower and Upper Maastrichtian in Hemmoor is a conspicuous marl layer, which also occurs at the same stratigraphic level on Rügen and in Denmark. The important guide coccolith Nephrolithus frequens in the Hemmoor section first appears in the middle part of the argentea / junior zone, 47,7 ± 0,2 m above the marl layer at the base of the Upper Maastrichtian. This makes it possible to correlate this horizon very well with the base of the Maastricht Chalk. In both Hemmoor and Limbourg, the maximum of flint development is immediately below this level (Fig. 3). Apart from this, the correlation between Hemmoor and Limbourg is less detailed than the correlation between Hemmoor and Denmark, due to the differences in the facies.