globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2016.06.003
论文题名:
Biostratigraphic and palaeoenvironmental controls on the trilobite associations from the Lower Ordovician Fezouata Shale of the central Anti-Atlas, Morocco
作者: Martin E.L.O.; Vidal M.; Vizcaïno D.; Vaucher R.; Sansjofre P.; Lefebvre B.; Destombes J.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 460
起始页码: 142
结束页码: 154
语种: 英语
英文关键词: Biostratigraphy ; Fezouata Shale ; Geochemistry ; Lower Ordovician ; Sedimentology ; Trilobita
英文摘要: Trilobites are a major component of both biomineralized and soft-bodied assemblages of the Fezouata Biota, central Anti-Atlas, Morocco. Trilobite taxa of the Fezouata Shale (Tremadocian–Floian) in the Zagora area are typical of Lower Ordovician communities from shallow shelf environments, and show strong affinities with Early Ordovician assemblages from the Montagne Noire (southern France). Dramatic variations in both taxonomic composition and taphonomic attributes, together with the sedimentological facies changes, allow us to discriminate the palaeoenvironmental versus stratigraphic control on trilobite assemblages. Three communities are described along an onshore–offshore profile, namely the pilekiid-bavarillid, Agerina and raphiophorid biofacies. Additionally, three stratigraphic assemblages are identified: assemblage 1 is confined to the late Tremadocian, assemblage 2 ranges from late Tremadocian to middle Floian and assemblage 3 is restricted to the Floian. The higher diversity of some levels is explained by storm-induced inputs of debris from taxa living in adjacent environments. Additionally, control of relative seal level variation on some peculiarities of the trilobite fauna (specific endemicity, lack of some expected taxa) is evidenced in the Fezouata Shale. Finally, temporary dysoxic events are highlighted by preliminary geochemical analyses, probably allowing episodic exceptional preservation. © 2016 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68266
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作者单位: Univ Lyon, Université Claude Bernard Lyon 1, ENS de Lyon, CNRS, UMR 5276 LGL-TPE, Villeurbanne, France; UMR 6538 Domaines Océaniques, IUEM-UBO, CNRS, Brest University, Place Copernic, Plouzané, France; 7, rue Jean Baptiste Chardin, Maquens, Carcassonne, France; 19, rue de la Fon de Madran, Pessac, France

Recommended Citation:
Martin E.L.O.,Vidal M.,Vizcaïno D.,et al. Biostratigraphic and palaeoenvironmental controls on the trilobite associations from the Lower Ordovician Fezouata Shale of the central Anti-Atlas, Morocco[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,460
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