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Journal of Micropalaeontology An open-access journal of The Micropalaeontological Society
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Volume 17, issue 1
J. Micropalaeontol., 17, 87-96, 1998
https://doi.org/10.1144/jm.17.1.87
© Author(s) 1998. This work is distributed under
the Creative Commons Attribution 4.0 License.
J. Micropalaeontol., 17, 87-96, 1998
https://doi.org/10.1144/jm.17.1.87
© Author(s) 1998. This work is distributed under
the Creative Commons Attribution 4.0 License.

  01 Apr 1998

01 Apr 1998

Planktic and benthic foraminiferal distribution patterns as a response to changes in surface fertility and ocean circulation: a case study from the Late Albian ‘Amadeus Segment’ (Central Italy)

Simone Galeotti Simone Galeotti
  • Istituto di Geologia dell’Università, Facoltà di Scienze, Località Crocicchia, I-61029 Urbino, Italy

Abstract. A combined geochemical and micropalaeontological study of the late Albian ‘Amadeus Segment’ of the Aptian–Albian organic-rich Scisti a Fucoidi Formation in central Italy shows that planktic foraminiferal assemblages record changes in abundance and composition which are markedly related to CaCO3 and Total Organic Carbon content of the sediments. The distribution pattern of different genera seems to record changes in nutrient supply and surface water temperature. Changes in palaeoceanographic regime are also reflected in abundance, composition and trophic structure of benthic foraminiferal assemblages as a response to variations of oxygen content and organic flux to the sea floor.

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