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Systematic Paleontology, Biostratigraphy, Paleobiogeography of Loftusia (Foraminifera) and Rudist Assemblages in a Regressive Sequence in the Hekimhan-Malatya Area (Eastern Anatolia) Turkey


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1 Firat Universitesi Muhendislik Fakultesi Jeoloji Bolumu Elazig, Turkey
2 Inonu Universitesi Muhendislik Fakultesi Maden Bolumu Malatya, Turkey
     

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The Maastrichtian regressive sequence of the Hekimhan-Malatya area in Eastern Turkey consists of dolomitic limestones, limestones and calcareous mudstones which are dominated by rudists and Loftusia (foraminifera) assemblages. Several Loftusia species indicating middle to late Maastrichtian age such as Loftusia anatolica Meric, L. baykali Meric, L. coxi Henson, L. harrisoni Cox, L. minor Cox and L. morgani Douville have been recorded. Other benthic foraminifers present include Orbitoides medius d' Archiac, Omphalocyclus macroporus (Lamarck), Laffitteina conica Drooger, Laffitteina mengaudi (Astre) and Laffitteina oeztuerki Inan. The rudists are abundant in the dolomitic limestones in the study area. The genus Miseia Patrulius is dominant and represented by Miseia bilacunosa Ozer and Miseia hekimhanensis Karacabey-Oztemur. The Loftusia species and the Rudists assemblage indicates middle to late Maastrichtian age for the formation. The paleobiogeographic distribution of the assemblage has been discussed taking this find into account.

Keywords

Loftusia (Foraminifera), Rudists, Maastrichtian, Hekimhan-Malatya, Eastern Turkey.
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  • Systematic Paleontology, Biostratigraphy, Paleobiogeography of Loftusia (Foraminifera) and Rudist Assemblages in a Regressive Sequence in the Hekimhan-Malatya Area (Eastern Anatolia) Turkey

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Authors

Meral Caglar (Kaya)
Firat Universitesi Muhendislik Fakultesi Jeoloji Bolumu Elazig, Turkey
Mehmet Onal
Inonu Universitesi Muhendislik Fakultesi Maden Bolumu Malatya, Turkey

Abstract


The Maastrichtian regressive sequence of the Hekimhan-Malatya area in Eastern Turkey consists of dolomitic limestones, limestones and calcareous mudstones which are dominated by rudists and Loftusia (foraminifera) assemblages. Several Loftusia species indicating middle to late Maastrichtian age such as Loftusia anatolica Meric, L. baykali Meric, L. coxi Henson, L. harrisoni Cox, L. minor Cox and L. morgani Douville have been recorded. Other benthic foraminifers present include Orbitoides medius d' Archiac, Omphalocyclus macroporus (Lamarck), Laffitteina conica Drooger, Laffitteina mengaudi (Astre) and Laffitteina oeztuerki Inan. The rudists are abundant in the dolomitic limestones in the study area. The genus Miseia Patrulius is dominant and represented by Miseia bilacunosa Ozer and Miseia hekimhanensis Karacabey-Oztemur. The Loftusia species and the Rudists assemblage indicates middle to late Maastrichtian age for the formation. The paleobiogeographic distribution of the assemblage has been discussed taking this find into account.

Keywords


Loftusia (Foraminifera), Rudists, Maastrichtian, Hekimhan-Malatya, Eastern Turkey.

References