Geyik Dağı和Anamas Dağ

IF 1.6 4区 地球科学 Q2 PALEONTOLOGY
Cemile Solak, Kemal Taslı
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引用次数: 0

摘要

牛头碳酸盐台地下白垩统碳酸盐岩层序以局限的内台地相为主。这些阶段的记录是有限的,因为早白垩世台地经常暴露在地面和潮上环境中。本文研究了塔里木盆地中部Geyik Dağı和Anamas daerdogan地区两个露头的下白垩统(Aptian-Albian)序列。富泥微相、层状、窗状、癌状、化石含量变化(底栖有孔虫、水藻、泥鳅等)表明,这些序列呈潮周浅化上升趋势。所研究的演替的地层细分利用了记录和说明的底栖有孔虫组合的指数分类群。组合I(下Aptian)主要以Voloshinoides murgensis和Debarina hahounerensis为特征;组合II(上Aptian)由Mesorbitolina parva、Carseyella tunesiana和“arenbulimina”geyikensis组成;组合III (Albian)由Mesorbitolina gr. texana、Protochrysalidina elongata和Pseudonummoloculina heimi组成。讨论了下白垩统一些物种的分布范围和地层意义。由于环境条件较差,该地区底栖有孔虫动物群多样性低,大型化石稀少。而Geyik Dağı地区的地层中则有丰富多样的大型底栖有孔虫、双壳类动物和腹足类动物。在Geyik Dağı地区富含有孔虫的Aptian-Albian上部地层中发现了一新种“Palaeocornuloculina”taurica,属于眼螨科。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Aptian–Albian shallow-marine carbonate successions of the Geyik Dağı and the Anamas Dağ areas (Central Taurides, Turkey): Benthic foraminiferal assemblages and “Palaeocornuloculina” taurica nov. sp. (Foraminifera)

The Lower Cretaceous carbonate successions of the Tauride Carbonate Platform(s) (TCP) are characterized by mostly restricted inner platform facies. The record of these stages is limited owing to frequent exposure of the platform to subaerial and supratidal settings during the Early Cretaceous. This study focuses on the Lower Cretaceous (Aptian–Albian) successions outcropping at two localities in the Geyik Dağı and Anamas Dağ areas, Central Taurides. These successions exhibit a peritidal shallowing upward trend evidenced by the dominance of mud-rich microfacies, lamination, fenestrae, oncoids, and changes in fossil content (benthic foraminifera, dasycladalean algae, rudists, etc.). The stratigraphic subdivisions of the studied successions utilize index taxa in the benthic foraminiferal assemblages which are documented and illustrated. Assemblage I (lower Aptian) is mainly characterized by Voloshinoides murgensis and Debarina hahounerensis; Assemblage II (upper Aptian) by Mesorbitolina parva, Carseyella tunesiana and “Arenobuliminageyikensis; and Assemblage III (Albian) by Mesorbitolina gr. texana, Protochrysalidina elongata and Pseudonummoloculina heimi. Ranges and stratigraphic significance of some species through the Lower Cretaceous are discussed. Due to less favorable environmental conditions, the strata in the Anamas Dağ area have a low-diversity benthic foraminifera fauna and sparse macrofossils. In contrast, the strata in the Geyik Dağı area host rich and diverse larger benthic foraminifera as well as rudist bivalves and gastropods. A new species, “Palaeocornuloculinataurica belonging to the family Ophthalmidiidae is described from these foraminifera-rich upper Aptian–Albian strata in the Geyik Dağı area.

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来源期刊
Geobios
Geobios 地学-古生物学
CiteScore
3.30
自引率
6.20%
发文量
28
审稿时长
6-12 weeks
期刊介绍: Geobios publishes bimonthly in English original peer-reviewed articles of international interest in any area of paleontology, paleobiology, paleoecology, paleobiogeography, (bio)stratigraphy and biogeochemistry. All taxonomic groups are treated, including microfossils, invertebrates, plants, vertebrates and ichnofossils. Geobios welcomes descriptive papers based on original material (e.g. large Systematic Paleontology works), as well as more analytically and/or methodologically oriented papers, provided they offer strong and significant biochronological/biostratigraphical, paleobiogeographical, paleobiological and/or phylogenetic new insights and perspectices. A high priority level is given to synchronic and/or diachronic studies based on multi- or inter-disciplinary approaches mixing various fields of Earth and Life Sciences. Works based on extant data are also considered, provided they offer significant insights into geological-time studies.
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