Journal
GEOLOGICAL JOURNAL
Volume 52, Issue 2, Pages 317-326Publisher
WILEY
DOI: 10.1002/gj.2759
Keywords
brachiopod; Mobarak Formation; Alborz Mountains; palaeobiogeography; Carboniferous
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Funding
- National Natural Science Foundation of China [41290260]
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The brachiopods from the upper part of the Mobarak Formation at the Kiyasar section in the eastern Alborz Mountains, northern Iran, have been studied in detail. Fifteen species assigned to 13 genera of Strophomenida, Orthotetida, Orthida, Productida, Athyridida and Spiriferida are described. The fauna is determined as early Visean in age based on the presence of Eomarginifera paucispinosa, Grandispirifer mylkensis and Unispirifer sp., and their associated foraminifers Uralodiscus, Paraarchaediscus, Glomodiscus and Endothyra, though taxa ranging through the Tournaisian-Visean are also present. A comparison of its palaeogeographical affinities with other faunas show that the Alborz brachiopod fauna maintains strong Palaeotethyan affinities based on its general similarities with those of Eurasia, North America and Australia. This is suggestive of a prevailing oceanic current that circulated between the northern and southern shelf sea of the Palaeotethys Ocean, with which the warm-water brachiopod taxa were widespread in the Palaeotethyan Realm through the early Visean. Copyright (C) 2016 John Wiley & Sons, Ltd.
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