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TWO NEW SPECIES OF RUDIST FROM AQRA FORMATION (MAASTRICHTIAN), KURDISTAN REGION, IRAQ | ||
| Iraqi Bulletin of Geology and Mining | ||
| Article 1, Volume 11, Issue 1, 2015, Pages 45-53 | ||
| Authors | ||
| Salam. I. Al-Dulaimi; ad S. Al-Sheikhly | ||
| Abstract | ||
| Two new species of rudist (Dictyoptychus acutidentatus n.sp.; Dictyoptychus mukabaensis n.sp.) have been described from the Maastrichtian Aqra Formation in Iraq. Rudist species and other associated microfossils indicate a Maastichtian age. The depositional environment of Aqra Formation is determined by the occurrence of the rudist, foraminifera, and microfacies analysis. These gave a clue that the formation was deposited over an elongated discontinuous paleo-ridge that extended from North West towards South East of Iraq, and they indicate a shallow warm marine environment, with high energy at the beginning graded upward to low/ medium energy. The deposition of the formation was characterized by high rate of sedimentation and frequent relative sea level fluctuation. | ||
| Keywords | ||
| Aqra; Rudist; Recumbent; Elevator; Iraq | ||
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