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Biostratigraphic study of the "Middelares Hospital" outcrop section in the Deurne Sand Member (Upper Miocene, Belgium) as based on foraminifera
Hooyberghs, H.J.F.; Moorkens, T.L.A. (2005). Biostratigraphic study of the "Middelares Hospital" outcrop section in the Deurne Sand Member (Upper Miocene, Belgium) as based on foraminifera. N. Jb. Geol. Palaont. Abh. 237(1): 5-28
In: Jagt, J.W.M. Neues Jahrbuch für Geologie und Paläontologie. Abhandlungen. E. Schweizerbart'sche Verlagsbuchhandlung: Stuttgart. ISSN 0077-7749, more
Peer reviewed article  

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Keywords
Author keywords
    (planktonic, benthic) foraminifera; coiling ratios; possible climateproxies; (Miocene, Pliocene) biostratigraphy; Belgium

Authors  Top 
  • Hooyberghs, H.J.F.
  • Moorkens, T.L.A.

Abstract
    In the "Middelares Hospital" section, a total of 66 foraminifera species were found in 13 non-decalcified levels. Below disturbed and decalcified Quaternary sediments, a ca. 30-cm-thick shell bed occurs, which comprises Pliocene molluscs and foraminifera including Cribrononion excavatum and Neogloboquadrina pachyderma, mainly forma sinistralis, and which is probably a lateral equivalent of the Oorderen Sand Member (Lillo Formation), but was possibly partly reworked during the Quaternary. This shell layer overlies Late Miocene Deurne Sands exhibiting Uvigerina deurnensis, Elphidium antoninum and N pachyderma (forma dextralis). Their position above and below the megafossil-rich intercalation proves a Late Miocene (Tortonian or Gramian) age. At the base of the outcrop, Middle Miocene deposits (Antwerp Sands) with Asterigerina guerichi staeschei and Elphidium inflatum were er.countered. The possible connections between climatic fluctuations and ratio changes in the coiling directions of the Neogloboquadrina pachyderma populations are discussed.

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