气候变化领域集成服务门户(CCPortal): Stratigraphic distribution and paleoecological significance of Early Jurassic (Pliensbachian-Toarcian) lithiotid-coral reefal deposits from the Central High Atlas of Morocco

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DOI	10.1016/j.palaeo.2018.09.001
	Stratigraphic distribution and paleoecological significance of Early Jurassic (Pliensbachian-Toarcian) lithiotid-coral reefal deposits from the Central High Atlas of Morocco
	Brame H.-M.R.; Martindale R.C.; Ettinger N.P.; Debeljak I.; Vasseur R.; Lathuilière B.; Kabiri L.; Bodin S.
发表日期	2019
ISSN	0031-0182
起始页码	813
结束页码	837
卷号	514
英文摘要	During the Early Jurassic, a group of large, aberrant bivalves called lithiotids proliferated in proximal, shallow marine environments. These lithiotids formed bioherms and extensive biostromes in the western and southern margins of the Tethys Ocean as well as eastern Panthalassa. In the Central High Atlas of Morocco, Pliensbachian and Toarcian (Lower Jurassic) lithiotid and lithiotid-coral reefal deposits occur within carbonate and mixed carbonate/siliciclastic neritic depositional settings. This study describes the stratigraphic distribution, taxonomy, and architecture of these lithiotid-rich deposits. The studied lithiotid and lithiotid-coral deposits from Morocco occur in sheltered, near-shore lagoons along tropical carbonate ramps and platforms. These facies are abundant in upper Pliensbachian strata as well as in the early Toarcian. The persistence and similarity of lithiotid-coral buildups across the stage boundary indicate that these ecosystems were not significantly affected by the Pliensbachian/Toarcian extinction in Morocco (at least, not until the Toarcian Oceanic Anoxic Event). In both the upper Pliensbachian and lower Toarcian, lithiotids (Lithioperna and Cochlearites) are frequently associated with phaceloid corals (Retiophyllia in the Pliensbachian and Phacellophyllia and Archaeosmiliopsis in the Toarcian) and solitary corals (Haimeicyclus and Archaeosmilia) as well as other corals and bivalves (Gervilleioperna, Mytiloperna, Opisoma, and rare megalodontids); however, the spatial distribution of taxa is patchy. The close association of lithiotid bivalves and corals is rarely documented in the literature, and lithiotid-coral reefal deposits are rare. Thus, these Moroccan biostromes and bioherms that record the interaction of corals and lithiotids are of particular scientific importance. Furthermore, multiple generations and successions of lithiotid-coral framestones can be observed in both Pliensbachian and Toarcian strata, which provide insight into the evolution of these communities and their resilience to ecosystem perturbations. Despite the success of lithiotid-coral communities in the Pliensbachian and Toarcian, these ecosystems were decimated by the Toarcian Oceanic Anoxic Event and never recovered. © 2018 Elsevier B.V.
英文关键词	Biostrome; Extinction; Lithiotid bivalves; Oceanic Anoxic Event; Phaceloid corals; Tethys Ocean
语种	英语
scopus关键词	anoxic conditions; bioherm; biostratigraphy; biostrome; bivalve; coral reef; extinction risk; Jurassic; nearshore dynamics; paleoecology; Pliensbachian; siliciclastic deposit; subtidal environment; taxonomy; Tethys; Toarcian; Morocco; Anthozoa; Bivalvia; Lithiotidae; Megalodontesidae; Retiophyllia
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151185
作者单位	Department of Geological Sciences, The University of Texas at Austin, 2275 Speedway Stop C9000, Austin, TX 78712, United States; Ivan Rakovec Institute of Palaeontology ZRC SAZU, Novi trg 2, Ljubljana, SI-1000, Slovenia; GeoRessources, University of Lorraine, Faculty of Science and Technology, BP 70239, Vandoeuvre-lès-Nancy CEDEX, 54506, France; Department of Geological Sciences, Faculty of Science and Techniques of Errachidia, University Moulay Ismail, BP 509, Boutalamine, Errachidia 52000, Morocco; Department of Geoscience, Aarhus University, Høegh-Guldbergs Gade 2, Aarhus C, 8000, Denmark
推荐引用方式 GB/T 7714	Brame H.-M.R.,Martindale R.C.,Ettinger N.P.,et al. Stratigraphic distribution and paleoecological significance of Early Jurassic (Pliensbachian-Toarcian) lithiotid-coral reefal deposits from the Central High Atlas of Morocco[J],2019,514.
APA	Brame H.-M.R..,Martindale R.C..,Ettinger N.P..,Debeljak I..,Vasseur R..,...&Bodin S..(2019).Stratigraphic distribution and paleoecological significance of Early Jurassic (Pliensbachian-Toarcian) lithiotid-coral reefal deposits from the Central High Atlas of Morocco.Palaeogeography, Palaeoclimatology, Palaeoecology,514.
MLA	Brame H.-M.R.,et al."Stratigraphic distribution and paleoecological significance of Early Jurassic (Pliensbachian-Toarcian) lithiotid-coral reefal deposits from the Central High Atlas of Morocco".Palaeogeography, Palaeoclimatology, Palaeoecology 514(2019).