First report of Mid Ordovician (Darriwilian) cephalopods from the Saluk Mountains, southern Kopet-Dagh Region, north-east Iran

IF 1.5 3区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Bulletin of Geosciences Pub Date : 2021-02-07 DOI:10.3140/BULL.GEOSCI.1808

D. H. Evans, M. Ghobadi, L. Popov, H. Jahangir

引用次数: 2

Abstract

An assemblage of orthoconic cephalopods collected from oolitic ironstones at the base of the Pelmis Formation (New) of the Saluk Mountains of the southern Kopet-Dahg Region of north-eastern Iran indicate that the base of the Pelmis Formation is likely to be Darriwilian in age. Preservation of the assemblage suggests that it is time averaged and may represent a condensed deposit. The assemblage consists of a single endoceratid, several members of the Orthoceratida as well as an indeterminate taxon. Overall, the assemblage shows affinities with South China and Baltica, as well as with other Middle Ordovician cephalopod assemblages recorded from Iran. • Key words: Ordovician, Darriwilian, Pelmis Formation, Cephalopoda, Orthoceratida, palaeobiogeography, peri-Gondwana, Kopet-Dagh, Iran.

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伊朗东北部Kopet-Dagh地区南部Saluk山脉中奥陶世（Darriwilian）头足类的首次报告

从伊朗东北部Kopet-Dahg地区南部Saluk山脉Pelmis组(New)底部的鲕状铁矿中收集的正锥头足类组合表明，Pelmis组底部的年龄可能为Darriwilian。保存的组合表明，它是时间平均的，可能代表一个浓缩矿床。该组合包括单个内角虫，正角虫的几个成员以及一个不确定的分类群。总体而言，该组合与中国南部和波罗的海以及伊朗记录的其他中奥陶世头足类组合具有相似性。•关键词:奥陶纪，Darriwilian, Pelmis组，头足目，正角目，古生物地理，perio - gondwana, Kopet-Dagh，伊朗

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来源期刊

Bulletin of Geosciences 地学-地球科学综合

CiteScore

3.10

自引率

5.30%

发文量

审稿时长

>12 weeks

期刊介绍： The Bulletin of Geosciences is an international journal publishing original research papers, review articles, and short contributions concerning palaeoenvironmental geology, including palaeontology, stratigraphy, sedimentology, palaeogeography, palaeoecology, palaeoclimatology, geochemistry, mineralogy, geophysics, and related fields. All papers are subject to international peer review, and acceptance is based on quality alone.