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
1998 Journal of Micropalaeontology  
<p><strong>Abstract.</strong> 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 CaCO<sub>3</sub> and Total Organic Carbon content of the sediments. The distribution pattern of different genera seems to record changes in nutrient supply and surface water
more » ... ature. 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.</p>
doi:10.1144/jm.17.1.87 fatcat:srlfdg3s5zbzxesr65g7cclsse