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Re-assessment of the new geological map of Belgium: earliest Oligocene dinoflagellate cyst-based ages in the Leuven area (sheet 24 Aarschot)
Van Simaeys, S.; De Man, E.; Vandenberghe, N. (2006). Re-assessment of the new geological map of Belgium: earliest Oligocene dinoflagellate cyst-based ages in the Leuven area (sheet 24 Aarschot). Geol. Belg. 10(1-2): 39-46
In: Geologica Belgica. Geologica Belgica: Brussels . ISSN 1374-8505; e-ISSN 2034-1954
Peer reviewed article  
Available in  Authors 
Keywords
    Belgium, Leuven
    Geological time > Phanerozoic > Geological time > Cenozoic > Paleogene > Palaeogene > Eocene > Priabonian
    Geological time > Phanerozoic > Geological time > Cenozoic > Paleogene > Palaeogene > Oligocene > Rupelian
    Dinoflagellata [WoRMS]
    Marine/Coastal
Author keywords
    Oligocene, dinoflagellate cysts, biostratigraphy, Tongrian, Belgium
Authors  Top 
  • Van Simaeys, S.
  • De Man, E.
  • Vandenberghe, N.
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.
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