Journal
FACIES
Volume 55, Issue 2, Pages 259-266Publisher
SPRINGER
DOI: 10.1007/s10347-008-0168-y
Keywords
Oncoid; Benthic foraminifera; Biomuration; Plassen Carbonate Platform; Late Jurassic
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Funding
- FWF [P 16812-B06]
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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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