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Palynology of the marine Middle Triassic in the SW Germanic Basin (Upper Muschelkalk, Luxembourg): Evidence for an important latest Anisian-early Ladinian sea-level lowstand

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Kurzfassung

Eine palynologische Untersuchung des offenmarinen Oberen Muschelkalks aus dem SW Germanischen Becken wird vorgestellt. Diese Abfolge umfasst vorwiegend feinkörnige Karbonatgesteine und Tonsteine einer Lagune. Die Häufigkeit und taxonomische Zusammensetzung der marinen und terrigenen Palynomorphen zeigen eine Phase starken terrigenen Eintrags, die die offenmarine Entwicklung unterbrach. Dies weist auf eine bedeutende Regression während des spätesten Anisiums (spätes Illyrium) bis frühen Ladiniums (Fassanium) hin, etwa gleichzeitig mit einer starken Regression in anderen Teilen dieses Beckens. Der dokumentierte Meeresspiegel-Tiefstand hat wahrscheinlich eine große eustatische Komponente, die durch die regionale Tektonik im Germanischen Becken überprägt wurde.

Abstract

A palynological study is presented of the open-marine Upper Muschelkalk from the SW Germanic Basin, a succession dominated by lagoonal fine-grained carbonates and terrigenous mudstones. The abundance and taxonomic composition of the marine and terrigenous palynomorphs shows a phase of strong terrigenous input, which interrupted the open-marine evolution. This suggests an important regression during latest Anisian (late Illyrian) to early Ladinian (Fassanian) time, which is approximately coeval with a strong regression in other parts of this basin. The documented sea-level lowstand probably has a strong eustatic component, which was overprinted by the regional tectonics in the Germanic Basin.

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Vecsei, A., Rauscher, R. & Hohage, K. Palynology of the marine Middle Triassic in the SW Germanic Basin (Upper Muschelkalk, Luxembourg): Evidence for an important latest Anisian-early Ladinian sea-level lowstand. Paläontol Z 77, 195–202 (2003). https://doi.org/10.1007/BF03004568

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