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Upper Albian and Lower Cenomanian ammonites occur on the eastern margin of the Lut block in eastern Iran. The ammonite assemblages described herein are from the Nimbolook and Kerch sections located west of Qayen. The following taxa are described: Mantelliceras mantelli (J. Sowerby, 1814), Mantelliceras saxbii (Sharpe, 1857), Mantelliceras sp. 1, Mantelliceras sp. 2, Mantelliceras sp. 3, Sharpeiceras laticlavium (Sharpe, 1855), Sharpeiceras schlueteri (Hyatt, 1903), Puzosia (Puzosia) mayoriana (Orbigny, 1841), Hyphoplites costosus C.W. Wright & E.V. Wright, 1949, Mortoniceras (Mortoniceras) cf. fallax (Breistroffer, 1940), Mantelliceras cf. mantelli (J. Sowerby, 1814), Calycoceras (Gentoniceras) aff. gentoni (Brongniart, 1822), Idiohamites fremonti (Marcou, 1858), Mariella (Mariella) sp., Mariella (Mariella) dorsetensis (Spath, 1926), and Turrilites costatus Lamarck, 1801. The ammonite assemblages clearly indicate a late Albian-middle Cenomanian age for the Nimbolook section and late Albian-early Cenomanian age for the Kerch section.

Albian and Cenomanian ammonites of the eastern margin of the Lut block (East Iran)