Geologica Belgica

1374-8505 2034-1954

 

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Stefaan VAN SIMAEYS, Ellen DE MAN & Noël VANDENBERGHE

RE-ASSESSMENT OF THE NEW GEOLOGICAL MAP OF BELGIUM: EARLIEST OLIGOCENE DINOFLAGELLATE CYST-BASED AGES IN THE LEUVEN AREA (SHEET 24 AARSCHOT)

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Abstract

Abstract. 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.

KEYWORDS: Oligocene, dinoflagellate cysts, biostratigraphy, Tongrian, Belgium

Om dit artikel te citeren:

Stefaan VAN SIMAEYS, Ellen DE MAN & Noël VANDENBERGHE, «RE-ASSESSMENT OF THE NEW GEOLOGICAL MAP OF BELGIUM: EARLIEST OLIGOCENE DINOFLAGELLATE CYST-BASED AGES IN THE LEUVEN AREA (SHEET 24 AARSCHOT)», Geologica Belgica [En ligne], volume 10 (2007), number 1-2, 39-46 URL : https://popups.ulg.ac.be/1374-8505/index.php?id=1371.

Over : Stefaan VAN SIMAEYS

Historical Geology, University of Leuven, Redingenstraat 16, B-3000 Leuven, Belgium

Over : Ellen DE MAN

Royal Belgian Institute of Natural Sciences, Vautierstraat 29, B-1000 Brussels, Belgium

Over : Noël VANDENBERGHE

Historical Geology, University of Leuven, Redingenstraat 16, B-3000 Leuven, Belgium