Arid
DOI10.1016/j.geobios.2016.11.002
The Cenomanian-Turonian boundary in Jordan: Ammonite biostratigraphy and faunal turnover
Nagm, Emad1,2; Farouk, Sherif3; Ahmad, Fayez4
通讯作者Nagm, Emad
来源期刊GEOBIOS
ISSN0016-6995
EISSN1777-5728
出版年2017
卷号50期号:1页码:37-47
英文摘要

Well-exposed fossiliferous Upper Cenomanian-Lower Turonian marine sedimentary rocks are present in west-central Jordan. Ammonites serve as an important faunal marker for this interval and can be used to subdivide the Cenomanian-Turonian transition into two upper Cenomanian biozones (Neolobites vibrayeanus and Vascoceras cauvini) and two lower Turonian biozones (Vascoceras proprium and Choffaticeras segne). A revised stratigraphic range of the Vascoceras cauvini Zone in the study area is proposed, consisting of the Metoicoceras geslinianum and Neocardioceras juddii zones of the standard zonation. Based on intercontinental biostratigraphic correlation, a minor unconformity appears to be present around the Cenomanian-Turonian boundary, and a part of the lower Turonian is probably missing. In addition, a faunal turnover is recorded in the uppermost Cenomanian, marked by the disappearance of most of the Cenomanian taxa, including Costagyra olisiponensis (Sharpe), Ceratosh-eon flabellatum (Goldfuss), llymatogyra africana (Lamarck), Rhynchostreon suborbiculatum (Lamarck), Harpagodes nodosus (Sowerby), and Heterodiadema libycum (Desor). This bioevent is thought to be an effect of the Oceanic Anoxic Event OAE 2; the dramatic shifts in species richness and diversity spanning the Cenomanian-Turonian boundary in the study area occurred in response to the major paleoclimatic and paleoenvironmental perturbations prevailing at that time. The stratigraphic and paleontological patterns studied in Jordan are very similar to those recorded in Egypt in terms of litho- and biostratigraphy, event stratigraphy, and macroinvertebrate content, suggesting the presence of uniform triggering mechanisms and bio-sedimentary responses in the Upper Cretaceous basins of the Middle East and providing clues for a high-resolution correlation between the two areas. (C) 2016 Elsevier Masson SAS. All rights reserved.


英文关键词Cenomanian Turonian Ammonites Biostratigraphy Faunal turnover Jordan Middle East
类型Article
语种英语
国家Saudi Arabia ; Egypt ; Jordan
收录类别SCI-E
WOS记录号WOS:000409293800005
WOS关键词WEST-CENTRAL JORDAN ; EASTERN DESERT ; PALEOBIOGEOGRAPHIC IMPLICATIONS ; CRETACEOUS AMMONITES ; STABLE-ISOTOPE ; MIDDLE ATLAS ; WADI QENA ; STRATIGRAPHY ; EGYPT ; TRANSGRESSION
WOS类目Paleontology
WOS研究方向Paleontology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/199165
作者单位1.Taibah Univ, Fac Sci, Dept Geol, Medina 41411, Saudi Arabia;
2.Al Azhar Univ, Fac Sci, Dept Geol, Assiut 71524, Egypt;
3.Egyptian Petr Res Inst, Explorat Dept, Nasr City 11727, Egypt;
4.Hashemite Univ, Dept Earth & Environm Sci, Zarqa 13115, Jordan
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Nagm, Emad,Farouk, Sherif,Ahmad, Fayez. The Cenomanian-Turonian boundary in Jordan: Ammonite biostratigraphy and faunal turnover[J],2017,50(1):37-47.
APA Nagm, Emad,Farouk, Sherif,&Ahmad, Fayez.(2017).The Cenomanian-Turonian boundary in Jordan: Ammonite biostratigraphy and faunal turnover.GEOBIOS,50(1),37-47.
MLA Nagm, Emad,et al."The Cenomanian-Turonian boundary in Jordan: Ammonite biostratigraphy and faunal turnover".GEOBIOS 50.1(2017):37-47.
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