Organic-walled microfossils in the Oligocene Grimmertingen and Neerrepen sand members from the Grimmertingen type locality

Rich assemblages of organic-walled microfossils are present in the Grimmertingen Sands and Neerrepen Sands sampled in the type section of the Grimmertingen Member. Comparison with the distribution of the taxa in the Upper Eocene and Lower Oligocene deposits in the Kallo borehole and in the Rupelian type area point to a correlation with the upper part of the Bassevelde Sands Member, and with the Watervliet Clay and Wintham Silt Members. The distribution of taxa with paleoenvironmental significance indicate a cooling trend in the upper part of the Grimmertingen Sands and a subsequent phase of lo... Mehr ...