Geologica Belgica


ISSN 1374-8505

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volume 10 (2007) -- number 1-2

Type de document : Article

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)

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

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Pour citer cet article :

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, volume 10 (2007)  number 1-2 : 39-46
http://popups.ulg.ac.be/Geol/document.php?id=1371
Les auteurs : 
Stefaan  van SIMAEYS

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

Ellen  DE MAN

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

Noël  VANDENBERGHE

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

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