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You are here: Home / Library / RBINS Staff Publications / Re-assessment of the new geological map of Belgium: Earliest Oligocene dinoflagellate cyst-based ages in the Leuven area (sheet 24 Aarschot)

S.a Van Simaeys, E.b De Man and N.a Vandenberghe (2007)

Re-assessment of the new geological map of Belgium: Earliest Oligocene dinoflagellate cyst-based ages in the Leuven area (sheet 24 Aarschot)

Geologica Belgica, 10(1-2):39-46.

The dinoflagellate cyst (dinocyst) assemblages of two samples from a temporary outcrop in the vicinity of Haacht (Leuven) have been analysed. The co-occurrence of Areosphaeridium diktyoplokum, Cerebrocysta bartonensis, Glaphyrocysta semitecta, Rombodinium perforatum and Thalassiphora reticulata allows correlation with the North Sea Oligocene-1 zone. As a consequence, the considered unit has a latest Eocene to earliest Oligocene age, equivalent to the age of the marine Tongrian. Comparison of the studied area with the recent 1:50 000 geological map (sheet 24 Aarschot) shows that the current lithostratigraphic interpretation of the analysed section, i.e. the Middle Eocene Maldegem Formation, can no longer be uphold.

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