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a.1.Having small openings, or foramina.
2.Pertaining to, or composed of, Foraminifera; as, foraminiferous mud.
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Since the Miocene sedimentation changed to marly nannofossil chalks and foraminiferous nannofossil ooze showing signs of the influence of bottom currents and cyclic sedimentation patterns (Rehault and Mauffret, 1979).