Horna, Frank, Krentz, Ottomar, Buske, Stefan, Schönfeld, Joachim and Sonnabend, Lutz (2011) Die Mergel von Börnersdorf (Osterzgebirge) - Stratigraphie, Tektonik und Geophysik eines verdeckten Oberkreiderelikte. Freiberger Forschungshefte: C, Geowissenschaften, 540 . pp. 65-78.

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Abstract

Cretaceous deposits, covered by Quaternary sediments in the Osterzgebirge (Saxony) between Bad Gottleuba and Börnersdorf have been investigated. Beside the interpretation of existing drill logs, 15 new short wells were drilled as well as three seismic profiles were shot. Samples were taken for micropaleontologic analysis. The existence of Upper Cretaceous marls with a lateral extent of about 500 by 600 metres was proven. Due to the results of the seismic and stratigraphic interpretation, a thickness of 250 to 300 m of sediments can be assumed. The Cretaceous deposits are bounded by NW-SE and NE-SW striking faults. The foraminifera assemblage indicates early to middle Coniacian age of the marls. From the occurrence of Cenomanian and lower Turonian sandstones nearby a fairly complete upper Cretaceous succession can be concluded. The origin of such a narrow delimited basin, with such a huge depth is not yet fully understood. At present we suggest that a pull-apart-basin is responsible for the preservation of the sediments.

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