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- Title
The uppermost Carboniferous (Gzhelian)–Lower Permian (Asselian–Sakmarian) stratigraphy and smaller foraminifers of the Ozbak‐Kuh region (Tabas Block, east central Iran).
- Authors
Yarahmadzahi, Hamed; Vachard, Daniel
- Abstract
The uppermost Carboniferous (Gzhelian)–Lower Permian (Asselian to Sakmarian) Anarak Group of the Zaladou section in central Iran is more than 180‐m thick and includes thick units of shale, calcareous sandstone, fusulinid limestone, sandy limestone, and dolomite. The Zaladou and Tigh‐e‐Madanu formations of this group were dated as Gzhelian to Sakmarian. A review of the smaller foraminifers of the Zaladou section is presented. Five foraminiferal subzones grouped in three biozones are proposed in this work: The first assemblage zone (I) is Gzhelian; the second zone (II) corresponds to the Gzhelian–Asselian boundary interval, and the third biozone (III) is Asselian in age. Biozone I is subdivided informally into two subzones: the <italic>Hemigordius spirilliniformis</italic>‐<italic>Bradyina</italic> cf. <italic>samarica</italic> subzone IA (probably early Gzhelian in age) and the <italic>Raphconilia modificata</italic> and <italic>Globivalvulina</italic> spp. subzone IB (middle to late Gzhelian); biozone II is the <italic>Nodosinelloides</italic> spp. zone; biozone III is subdivided informally into two subzones: IIIA with <italic>Pseudoacutella partoazari</italic>‐<italic>Bradyina lucida</italic> and IIIB with <italic>Planoendothyra persica</italic> n. sp.‐<italic>Rectogordius</italic> sp. The studied assemblages are correlated with those from the Carnic Alps (Austria–Italy), East European Platform of Russia, the Urals (Russia), Darvas (Uzbekistan), the northern and central Pamirs (Tajikistan), northern Iran (Alborz), northern Afghanistan, and other classical regions of the Tethyan realm. The genera <italic>Raphconilia</italic> and <italic>Planoendothyra</italic> are revised, and <italic>Planoendothyra persica</italic> n. sp. is described.
- Subjects
CARBONIFEROUS Period; LIMESTONE; DOLOMITE; SANDSTONE; SHALE
- Publication
Geological Journal, 2018, Vol 53, Issue 2, p510
- ISSN
0072-1050
- Publication type
Article
- DOI
10.1002/gj.2909