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DOI	10.1016/j.palaeo.2018.11.021
	Shrimps and leaves: Phytodetrital pulses and bioturbation in deposits of a river-dominated delta (Middle Jurassic Lajas Formation; Neuquén Basin; Argentina)
	Arregui M.G.; Buatois L.A.; Rodriguez E.
发表日期	2019
ISSN	0031-0182
起始页码	179
结束页码	189
卷号	516
英文摘要	The Middle Jurassic Lajas Formation of the Neuquén Basin (Argentina) records mainly deltaic sedimentation. However, the precise role of the depositional mechanisms involved is still controversial. Well core YPF Nq. Laj-8 records the overall vertical transition from delta-front mouth bars to delta plain. Discrete mouth-bar successions typically comprise a lower unbioturbated sandstone unit that passes upwards into a more intensely bioturbated sandstone unit. Phytodetrital material is abundant through the mouth-bar succession forming distinct layers in the lower units and becoming part of the lining of the burrow walls of Ophiomorpha irregulaire and Gyrolithes isp. in the upper units, representing two successive developmental stages of deltaic sandy mouth bars. Layers rich in phytodetritus exhibiting the same characteristics have been traditionally interpreted in outcrop as mudstone drapes generated by tidal action during slack-water periods. However, more recent research suggests that these layers can be best regarded as produced by river-fed flows, which is consistent with a river-dominated delta model. © 2018 Elsevier B.V.
英文关键词	Argentina; Crustacean burrows; Depositional dynamics; Plant material; Trace fossils
语种	英语
scopus关键词	bioturbation; burrow; crustacean; deltaic sedimentation; depositional environment; Jurassic; leaf; mudstone; outcrop; phytodetritus; river bed; river flow; sandstone; trace fossil; Argentina; Neuquen Basin; Crustacea
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/151094
作者单位	Y-Tec S.A., Av. del Petróleo s/n (entre 129 y 143), Berisso, Buenos Aires 1923, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas CONICET, Argentina; Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada
推荐引用方式 GB/T 7714	Arregui M.G.,Buatois L.A.,Rodriguez E.. Shrimps and leaves: Phytodetrital pulses and bioturbation in deposits of a river-dominated delta (Middle Jurassic Lajas Formation; Neuquén Basin; Argentina)[J],2019,516.
APA	Arregui M.G.,Buatois L.A.,&Rodriguez E..(2019).Shrimps and leaves: Phytodetrital pulses and bioturbation in deposits of a river-dominated delta (Middle Jurassic Lajas Formation; Neuquén Basin; Argentina).Palaeogeography, Palaeoclimatology, Palaeoecology,516.
MLA	Arregui M.G.,et al."Shrimps and leaves: Phytodetrital pulses and bioturbation in deposits of a river-dominated delta (Middle Jurassic Lajas Formation; Neuquén Basin; Argentina)".Palaeogeography, Palaeoclimatology, Palaeoecology 516(2019).