Foraminifera from the Maastrichtian Garzan and Lower Germav formations of the Arabian Platform (Batman, SE Turkey)

IF 1.3 4区地球科学 Q3 PALEONTOLOGY

Micropaleontology Pub Date : 2020-09-01 DOI:10.47894/mpal.66.5.05

Derya Sinanoğlu, N. Ozgen-Erdem, Bilal Sarı

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引用次数: 4

Abstract

The Upper Cretaceous successions of the Arabian Platform in Batman and surroundings (SE Turkey) comprise the Garzan and Lower Germav formations. Shallow water limestones of the Garzan Formation contain rich benthic foraminiferal assemblages. The conformably overlying LowerGermav Formation consists mostly of marls and includes planktonic foraminifera, which suggest a relatively deeper marine environment. Benthic and planktonic foraminiferal assemblages fromboth formations were studied in 28 samples collected from a 155-m-thickmeasured section. Diverse benthic foraminiferal assemblages are mainly dominated by Orbitoides megaloformis Papp and KÃ¼pper, O. media (dâ€™Archiac), Omphalocyclus anatoliensis Ozcan, Dicyclina schlumbergeri Munier-Chalmas, Trochospira avnimelechi Hamaoui, Nezzazata simplex Omara, Nezzazatinella picardi (Henson), Antalyna korayi Farinacci and Koyluoglu, Fleuryana adriatica (DeCastro), Biconcava bentori Hamaoui, Cuneolina pavonia dâ€™Orbigny,C. ketini Inan, Moncharmontia apenninica (DeCastro), M. compressa (De Castro), Fissoelphidium operculiferum Smout and Vandenbroekia munieri Marie. Themajority of Late Cretaceous taxa are long-ranging. Orbitoides media and O. megaloformis within this assemblage have been documented both in the upper Campanian and Maastrichtian strata from the Tethyan Province. The age of the Garzan Formation is determined to be Maastrichtian based on the presence of Antalyna korayi, C. ketini and Fleuryana adriaticia. The abundance of opportunist planktonic foraminifera (i.e., biserial heterohelicids and rugoglobigerinids) throughout the Lower Germav Formation shows that the environmentwas not very deep during the deposition of the unit. Maastrichtian taxa such as Globotruncanita conica (White) and Globotruncanella minuta Caron and Gonzales Donoso appear in the middle part of the Lower Germav Formation, but these are absent from the lower part of the formation.

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阿拉伯地台马斯特里赫特阶加赞组和下日耳曼组的有孔虫（Batman，土耳其东南部）

Batman及其周边地区（土耳其东南部）阿拉伯地台的上白垩纪序列包括Garzan和Lower Germav地层。加尔赞组浅水石灰岩中含有丰富的底栖有孔虫组合。整合覆盖的LowerGermav组主要由泥灰岩组成，并包括浮游有孔虫，这表明存在相对较深的海洋环境。在155米厚的剖面上采集的28个样本中，研究了这两个地层的底栖有孔虫和浮游有孔虫组合。多样的底栖有孔虫组合主要由大孔虫Papp和Ká¼pper，O.media（dâ€™Archiac）、Omphalcyclus anatoliensis Ozcan、Dicyclina schlumbergeri Munier Chalmas、Trochospira avnimelechi Hamaoui、Nezzazata simplex Omara、Nezzzatinella picardi（Henson）、Antalyna korayi Farinacci和Koyluoglu、Fleuryana adriatica（DeCastro）、Biconcava bentori Hamaoui™奥比尼C。ketini Inan、Moncharmontia apenninica（德卡斯特罗）、M.compressa（德卡斯特罗饰）、Fissoelphidium operculiferum Smout和Vandenbroekia munieri Marie。晚白垩世分类群的主要分布范围很广。在特提斯省的上坎潘阶和马斯特里赫特阶地层中，都记录了该组合中的眶状介质和巨型O。根据Antalyna korayi、C.ketini和Fleuryana adriatia的存在，Garzan组的年龄被确定为马斯特里赫特阶。整个Lower Germav组中机会主义浮游有孔虫（即双陆异螺旋虫和皱脊有孔虫）的丰度表明，在该单元沉积期间，环境不是很深。马斯特里赫特阶分类群，如锥状球藻（白色）和微小球藻Caron和Gonzales Donoso，出现在下Germav组的中部，但在组的下部不存在。

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来源期刊

Micropaleontology 地学-古生物学

CiteScore

3.20

自引率

6.70%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal of Micropalaeontology (JM) is an established international journal covering all aspects of microfossils and their application to both applied studies and basic research. In particular we welcome submissions relating to microfossils and their application to palaeoceanography, palaeoclimatology, palaeobiology, evolution, taxonomy, environmental change and molecular phylogeny. Owned by The Micropalaeontological Society, the scope of the journal is broad, demonstrating the application of microfossils to solving broad geoscience issues.