埃及中西奈El Hasana地区早马斯特里赫特-早始新世生物地层学

IF 0.9 4区 地球科学 Q4 PALEONTOLOGY
Adel El Shahawy, A. Ismail, M. Faris, A. A. Naby
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引用次数: 1

摘要

在埃及西奈半岛中部El Hasana地区的两个剖面中,发现了10个钙质超微化石和10个浮游有孔虫生物带。在West El Hasana剖面中,由于没有浮游有孔虫Gansserina gansseri带、Abathophalus mayaroensis带和Globigerina eugubina带,以及钙质超微浮游生物Micula prinsii带和Markalius inverus带,记录到马斯特里赫特阶早期/古新世早期(K/Pg)不整合。古新世早期由两个生物带代表,即Morozovella pseudo-buloides(P1b)和Morozovela trinidadensis(P1c),它们与Cruciplacolitus tenuis带(NP2)、Chiasmolithus danicus带(NP3)和Ellipseolitus macellus带(NP4)相关。在这两个剖面中,在古新世中期,记录了三个生物带:钩状Morozovella uncinata(P2)、P3的下部Morozovela angulata和扁平虫(P3的上部)。第一个和第二个生物带相当于椭圆石(NP4)的上三分之二,而第三个生物带与鼓形筋膜带(NP5)相关。在West El Hasana剖面中,Planorotalites pseudomenardi带(P4)结束了测量剖面。在东El Hasana剖面的古新世晚期/始新世早期(P/E)边界上观察到一个小的间断。这种间断是由于缺乏拟梅纳迪扁玄岩带(P4)、velascoensis Morozovella带(P5)、M.edgari带(P6的下部)和Heliolithus kleinpelli带(NP6)、莫赫里盘石带(NP7)、列代利盘石/诺比利盘石区(NP8)和盘石属(例如D.araneus)NP9a亚区。东El Hasana剖面的P/E边界由Rhombaster spp.(例如,Rhombaster-bitrifida)NP9b亚区的出现划定,该亚区与浮游有孔虫Morozovella亚区的外观一致(P6的上部)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Early Maastrichtian-Early Eocene Biostratigraphy of El Hasana Area, Central Sinai, Egypt
Ten calcareous nannofossils and ten planktic foraminiferal biozones were recognized from two sections measured in El Hasana area, in Central Sinai, Egypt. In the West El Hasana section, an early Maastrichtian/early Paleocene (K/Pg) unconformity was recorded due to the absence of the planktic foraminiferal Gansserina gansseri, Abathomphalus mayaroensis, and Globigerina eugubina Zones and the calcareous nannoplankton Micula prinsii and Markalius inversus Zones. The early Paleocene is represented by two biozones, Morozovella pseudobulloides (P1b) and Morozovella trinidadensis (P1c) that correlate with the Cruciplacolithus tenuis Zone (NP2), Chiasmolithus danicus Zone (NP3), and Ellipsolithus macellus Zone (NP4). In both sections, during the middle Paleocene three biozones were recorded: Morozovella uncinata (P2), the lower part of P3 Morozovella angulata, and Planorotalites pusilla pusilla (upper part of P3). The first and second biozones are equated with the upper two thirds of Ellipsolithus macellus (NP4), while the third one is correlated with Fasciculithus tympaniformis Zone (NP5). In the West El Hasana section, the Planorotalites pseudomenardii Zone (P4) ends the measured section. A small hiatus was observed across the late Paleocene/early Eocene (P/E) boundary in the East El Hasana section. This hiatus is due to the absence of the Planorotalites pseudomenardii Zone (P4), Morozovella velascoensis Zone (P5), M. edgari Zone (lower part of P6) and Heliolithus kleinpellii Zone (NP6), Discoaster molheri Zone (NP7), Heliolithus riedelli/Discoaster nobilis Zone (NP8), and Discoaster spp. (e.g., D. araneus) Subzone NP9a. The P/E boundary in East El Hasana section is delineated with the appearance of Rhomboaster spp. (e.g., Rhomboaster bitrifida) NP9b Subzone that coincides with the appearance of the planktic foraminiferal Morozovella subbotinae Zone (upper part of P6).
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来源期刊
Journal of Foraminiferal Research
Journal of Foraminiferal Research 地学-古生物学
CiteScore
2.10
自引率
9.10%
发文量
32
审稿时长
>12 weeks
期刊介绍: JFR publishes original papers of international interest dealing with the Foraminifera and allied groups of organisms. Review articles are encouraged.
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