Abstract
Oncoidal limestones with different oncoid types are ubiquitous in back-reef open-lagoonal and, to a minor amount, in closed-lagoonal facies of the Late Jurassic Plassen Carbonate Platform of the Northern Calcareous Alps. A common feature of the oncoids from moderately to well-agitated open-lagoonal habitats are incorporated small trochospiral benthic foraminifers, tentatively assigned to trochamminids, switched between individual micritic layers. Their life style is discussed concluding a specialized feeding on cyanophytes on the outer side of the oncoids and later becoming biomurated by successive sheet formations due to oncoid growing.
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Acknowledgments
This paper was funded by the FWF project P 16812-B06. Samples from Mount Trisselwand were kindly provided by Matthias Auer (Glasgow). We kindly acknowledge helpful comments by Matías Reolid (Jaén) and an anonymous reviewer.
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Schlagintweit, F., Gawlick, HJ. Oncoid-dwelling foraminifera from Late Jurassic shallow-water carbonates of the Northern Calcareous Alps (Austria and Germany). Facies 55, 259–266 (2009). https://doi.org/10.1007/s10347-008-0168-y
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DOI: https://doi.org/10.1007/s10347-008-0168-y