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Late Paleocene Orthophragminae (Foraminifera) from the Haymana-Polatli Basin, central Turkey and description of a new taxon, Orbitoclypeus haymanaensis

Ercan Ozcan, Ercument Sirel, Sevinc Ozkan Altiner and Sinan Colakoglu
Late Paleocene Orthophragminae (Foraminifera) from the Haymana-Polatli Basin, central Turkey and description of a new taxon, Orbitoclypeus haymanaensis
Micropaleontology (2001) 47 (4): 339-357

Abstract

A transgressive shallow-marine succession suggested as a reference-section for early Thanetian by the "Early Paleogene working group" (IGCP 286) was studied for its orthophragminid foraminifera from Haymana-Polath Basin in central Anatolia. Orthophragminae, closely associated with Assilina yvettae and Operculina heberti, have been identified in a friable clastic-carbonate sequence which contains Glomalveolina in its different horizons. Basinal sediments with planktonic taxa overlie the shallow-water deposits and preclude the study of orthophragminae higher in the succession. Orthophragminae, studied in oriented sections, were grouped into four categories considering the qualitative and quantitative aspects of megalospheric embryo and morphologic elements of equatorial and lateral chamberlets in equatorial and partly vertical sections. Thus, Discocyclina seunesi, Orbitoclypeus neumannae and Discocyclina sp. 1 have been identified and a new species, Orbitoclypeus haymanaensis, is erected. These assemblages were dated to Thanetian based upon the calcareous nannofossil and planktonic foraminifera identified in the overlying basinal sediments and also the benthonic foraminifera either associated with orthophragminae or present in different horizons of the shallow-marine succession.


ISSN: 0026-2803
Coden: MCPLAI
Serial Title: Micropaleontology
Serial Volume: 47
Serial Issue: 4
Title: Late Paleocene Orthophragminae (Foraminifera) from the Haymana-Polatli Basin, central Turkey and description of a new taxon, Orbitoclypeus haymanaensis
Affiliation: Akdeniz University, Department of Geological Engineering, Antalya, Turkey
Pages: 339-357
Published: 2001
Text Language: English
Publisher: American Museum of Natural History, New York, NY, United States
References: 25
Accession Number: 2003-041807
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. strat. cols., 4 plates, 3 tables, geol. sketch map
N39°00'00" - N40°00'00", E32°00'00" - E33°00'00"
Secondary Affiliation: Ankara University, TUR, TurkeyMiddle East Technical University, TUR, TurkeyNigde University, TUR, Turkey
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 200313
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