The Vijlen chalk Member (Maastrichtian, Late Cretaceous) in the Meuse-Rhine Euregion
1996
Felder, P.J. (Liege univ. (Belgium). Services associes de paleontologie)
Samples of Vijlen Member chalks from a number of boreholes and outcrops have been analysed for their 1-2.4 mm bioclast content, in order to be able to present an overview of this deposit. The studied sections could be correlated mainly on the basis of foraminifera. Sections through the area reveal that tectonic movements in conjunction with marine regressions and transgressions determined the sedimentation/erosion patterns. During one of the regression phases (Bovenste Bos Horizon), deep (up to 50 metres) channels developed in an extensive strand plain. These channels were filled during the subsequent transgression phase in the early Maastrichtian, which is why at the Lower/Upper Maastrichtian boundary another strand plain came into existence (Boeckler Horizon). During the late Maastrichtian relatively pure chalks were laid down, which contain small flint nodules offshore.
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