Poederlee Member

The information on this page is a summary description.
The full formal description is available here: Poederlee Member

Abbreviation LiPd
Parent unit Lillo Formation
Child units
Lithological description The unit is defined as a fine-grained, slightly glauconitic (< 5%) unit with discrete lenses of clay in the base. The sediments are bioturbated. The upper part of the member is oxidized in the type area, and sometimes limonitic sandstone with moulds of shells occurs (Geets, 1962). The grain-size distribution of the Poederlee Member is very well sorted with a modal size between 175 and 200 µm and fines (<44 µm) content around 5 % (Gullentops, 1963; Buffel et al., 2001). The Heiende facies (c. 2 m) is a fine-grained without glauconite present in the upper part of the unit in the Antwerp Campine area (Buffel et al., 2001). A distinct basal gravel, the Hukkelberg gravel, is present at the base of the member. The discoidal pebbles show long distance transport and the rates of flattening and roundness at different localities are indicative of transport from the west. The gravel also contains silicified ooliths typical for the Kieseloolite Formation in in the east and ultimately derived from northeastern (Gulinck, 1960; Gullentops & Huyghebaert, 1999).
Age Biostratigraphical analysis with dinoflagellate cysts on samples from the Oud-Turnhout borehole (GSB 017E 0401; DOV kb8d17e-B497) indicates deposition during the late Zanclean – Piacenzian (Louwye & De Schepper, 2010).
Thickness According to Schiltz et al. (1993) the thickness of the Poederlee Member is maximum 10 m.
Area of occurrence The Poederlee Member occurs in the central part of the Antwerp Campine area in northern Belgium, roughly between the villages of Poederlee in the south and Beerse in the north.
Type locality The type area is the village Poederlee (c. 30 km east of Antwerp) and the type section is in the hills north of Poederlee. The type borehole is the Oud-Turnhout borehole (GSB 017E 0401; DOV kb8d17e-B497) between 30.5 and 38.71 m depth (Buffel et al., 2001). The type log is from the Turnhout borehole (GSB 017E0398; DOV kb8d17e-B494) between 31 and 38 m depth (Louwye et al., 2020).
Alternative names Former Poederlee Formation, including Heiende facies, Hukkelberg gravel
Authors Louwye, S., Deckers, J., & Vandenberghe, N.
Date 01/09/2023
Cite as Louwye, S., Deckers, J., & Vandenberghe, N., 2023. The Poederlee Member, 01/09/2023. National Commission for Stratigraphy Belgium. http://ncs.naturalsciences.be/lithostratigraphy/Poederlee-Member
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