干旱区生态环境知识资源中心(Arid): Geology, biostratigraphy and carbon isotope chemostratigraphy of the Palaeogene fossil-bearing Dakhla sections, southwestern Moroccan Sahara

Arid

DOI	10.1017/S0016756817000851
	Geology, biostratigraphy and carbon isotope chemostratigraphy of the Palaeogene fossil-bearing Dakhla sections, southwestern Moroccan Sahara
	Benammi, Mouloud 1; Adnet, Sylvain 2; Marivaux, Laurent 2; Yans, Johan 3; Noiret, Corentin 3; Tabuce, Rodolphe 2; Surault, Jerome 1; El Kati, Imad 4; Enault, Sebastien 2; Baidder, Lahssen 5; Saddiqi, Omar 5; Benammi, Mohamed 4
通讯作者	Benammi, Mouloud
来源期刊	GEOLOGICAL MAGAZINE
ISSN	0016-7568
EISSN	1469-5081
出版年	2019
卷号	156 期号:1 页码:117-132
英文摘要	New Palaeogene vertebrate localities were recently reported in the southern Dakhla area (southwestern Morocco). The Eocene sediment strata crops out on cliffs along the Atlantic Ocean coast. Vertebrate remains come from five conglomeratic sandstone beds and are principally represented by isolated teeth belonging to micromammals, selachians and bony fishes, a proboscidean assigned to ?Numidotherium sp. and many remains of archaeocete whales (Basilosauridae). From fieldwork five lithostratigraphic sections were described, essentially based on the lithological characteristic of sediments. Despite the lateral variations of facies, correlations between these five sections were possible on the basis of fossil-bearing beds (A1, B1, B2, C1 and C2) and five lithological units were identified. The lower part of the section consists of rhythmically bedded, chert-rich marine siltstones and marls with thin black phosphorite with organic matter at the base. The overlying units include coarse-grained to microconglomeratic sandstones interbedded with silts, indicating deposition in a shallow-marine environment with fluvial influence. The natural remanence magnetization of a total of 50 samples was measured; the intensity of most of the samples is too weak however, before or after the first step of demagnetization. The palaeomagnetic data from the samples are very unstable, except for eight from three similar sandstone levels which show a normal polarity. Matched with biostratigraphic data on rodents, primates, the selachian, sirenian and cetacean faunas, the new carbon isotope chemostratigraphy on organics (1) refines the age of the uppermost C2 fossil-bearing bed to earliest Oligocene time and (2) confirms the Priabonian age of the B1 to C1 levels.
英文关键词	Oligocene rodents southwestern Morocco magnetostratigraphy chemostratigraphy biostratigraphy
类型	Review
语种	英语
国家	France ; Belgium ; Morocco
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000454499600007
WOS关键词	GEOCHEMICAL CHARACTERIZATION ; EARLY OLIGOCENE ; MAMMAL FAUNAS ; TARFAYA BASIN ; EOCENE ; MARGIN ; AGE ; BOUNDARY ; MINERALS ; DESERT
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/2XILL650/215967
作者单位	1.Univ Poitiers, Inst Int Paleoprimatol Paleontol Humaine Evolut &, UMR CNRS 7262, UFR SFA, 40 Ave Recteur Pineau, F-86022 Poitiers, France; 2.Univ Montpellier, UMR 5554 CNRS UM IRD EPHE, ISE M, CC064,Pl Eugene Bataillon, F-34095 Montpellier 05, France; 3.Univ Namur, Dept Geol, Rue Bruxelles 61, B-5000 Namur, Belgium; 4.Univ Ibn Tofail, Fac Sci, Dept Geol, Lab Geol Geophys Georisques & Environm 3GE, BP 133, Kenitra, Morocco; 5.Univ Hassan II Casablanca, Lab Geosci, BP 5366 Maarif, Casablanca, Morocco
推荐引用方式 GB/T 7714	Benammi, Mouloud,Adnet, Sylvain,Marivaux, Laurent,et al. Geology, biostratigraphy and carbon isotope chemostratigraphy of the Palaeogene fossil-bearing Dakhla sections, southwestern Moroccan Sahara[J],2019,156(1):117-132.
APA	Benammi, Mouloud.,Adnet, Sylvain.,Marivaux, Laurent.,Yans, Johan.,Noiret, Corentin.,...&Benammi, Mohamed.(2019).Geology, biostratigraphy and carbon isotope chemostratigraphy of the Palaeogene fossil-bearing Dakhla sections, southwestern Moroccan Sahara.GEOLOGICAL MAGAZINE,156(1),117-132.
MLA	Benammi, Mouloud,et al."Geology, biostratigraphy and carbon isotope chemostratigraphy of the Palaeogene fossil-bearing Dakhla sections, southwestern Moroccan Sahara".GEOLOGICAL MAGAZINE 156.1(2019):117-132.