Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.jafrearsci.2014.03.017 |
Calcareous benthonic foraminifera across the Cretaceous/Paleocene transition of Gebel Urn El-Ghanayem, Kharga Oasis, Egypt | |
Orabi, Orabi H.1; Khalil, Hamza M.2 | |
通讯作者 | Orabi, Orabi H. |
来源期刊 | JOURNAL OF AFRICAN EARTH SCIENCES
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ISSN | 1464-343X |
EISSN | 1879-1956 |
出版年 | 2014 |
卷号 | 96页码:110-121 |
英文摘要 | The studies of benthic calcareous foraminifera of the Maastrichtian-early Paleocene Dakhla Formation in Gebel Um El-Ghanayem (Western Desert, Egypt), improve reconstruction of depositional environments of these successions. In total, 68 taxa of benthic foraminifera were identified in the studied succession. The late Maastrichtian assemblages (Zone CF3) are dominated by calcareous foraminifera with tapered tests, this tapered taxon Loxostomum applinae, Lox. tegulatum various dentalinid taxa, and Buliminella cushmani dominate in CF3 Biozone. We thus interpret these faunas as being dominated by infaunal morphogroups, suggesting a moderately eutrophic environment. Danian assemblages are characterized by abundant epifaunal trochospiral species, such as Cibicidoides abudurbensis, Cibicidoides farafraensis, and Gyroidinoides girardanus. The infaunal morphogroups make up 25-47% of fauna in the Danian, in contrast to 62-76% in the Upper Maastrichtian. This dominance of the Danian benthic foraminiferal assemblages by epifaunal or mixed epifaunal/infaunal morphogroups suggests that the food supply to the benthos was less abundant than in the latest Cretaceous. The Cretaceous/Paleocene boundary (K/Pg) is within the upper unit of the Lower Kharga Member and marked by a hiatus in at least the top of CF3 Zone of the Upper Maastrichtian to the Lower Paleocene (base Plc Zone). (C) 2014 Elsevier Ltd. All rights reserved. |
英文关键词 | Egypt Benthic Foraminifera Kharga Oasis Cretaceous Paleocene |
类型 | Article |
语种 | 英语 |
国家 | Egypt |
收录类别 | SCI-E |
WOS记录号 | WOS:000338396300010 |
WOS关键词 | GULF-OF-MEXICO ; BENTHIC FORAMINIFERA ; TERTIARY BOUNDARY ; CRETACEOUS/TERTIARY BOUNDARY ; DEEP-SEA ; PALEOENVIRONMENTAL INFERENCES ; PLANKTONIC-FORAMINIFERA ; NORTHWESTERN TUNISIA ; CONTINENTAL-MARGIN ; EXTINCTION EVENTS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/182865 |
作者单位 | 1.Menoufia Univ, Fac Sci, Dept Geol, Menoufia, Egypt; 2.Tanta Univ, Fac Sci, Dept Geol, Tanta, Egypt |
推荐引用方式 GB/T 7714 | Orabi, Orabi H.,Khalil, Hamza M.. Calcareous benthonic foraminifera across the Cretaceous/Paleocene transition of Gebel Urn El-Ghanayem, Kharga Oasis, Egypt[J],2014,96:110-121. |
APA | Orabi, Orabi H.,&Khalil, Hamza M..(2014).Calcareous benthonic foraminifera across the Cretaceous/Paleocene transition of Gebel Urn El-Ghanayem, Kharga Oasis, Egypt.JOURNAL OF AFRICAN EARTH SCIENCES,96,110-121. |
MLA | Orabi, Orabi H.,et al."Calcareous benthonic foraminifera across the Cretaceous/Paleocene transition of Gebel Urn El-Ghanayem, Kharga Oasis, Egypt".JOURNAL OF AFRICAN EARTH SCIENCES 96(2014):110-121. |
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