气候变化领域集成服务门户(CCPortal): Distinguishing core and flank facies based on shell fabrics in Lower Jurassic lithiotid shell beds

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DOI	10.1016/j.palaeo.2019.04.010
	Distinguishing core and flank facies based on shell fabrics in Lower Jurassic lithiotid shell beds
	Brandolese V.; Posenato R.; Nebelsick J.H.; Bassi D.
发表日期	2019
ISSN	0031-0182
起始页码	1
结束页码	12
卷号	526
英文摘要	Lower Jurassic larger bivalves, mostly represented by the monospecific lithiotid genera Lithiotis, Cochlearites and Lithioperna, formed large shell accumulations in the shallow-water carbonate Tethyan and Panthalassa margins. A quantitative analysis of lithiotid accumulations from the Trento Platform (northern Italy) was carried out in order to distinguish the distribution of autochthonous, parautochthonous and allochthonous lithiotids in the accumulation core and flanks. Various representative accumulations are characterized with respect to systematic content, shell cover, shell density, disarticulation, shell fragmentation and orientation of individual shells. Lithioperna shows a high shell cover within the accumulation core while that of Cochlearites is variable and Lithiotis is rare. All three lithiotids occur in high densities in the accumulation flanks. As expected, autochthonous individuals of all three genera are frequent in the accumulation cores where they are preserved in life position. In the flanks, most bivalves are parautochthonous except for Lithioperna which can grow in life position. All bivalves in allochthonous shell beds are highly fragmented and disarticulated. The studied traits are potentially useful as proxies for distinguishing core or flank facies when the accumulation does not crop out as a whole. © 2019 Elsevier B.V.
英文关键词	Lithiotid bivalves; Palaeoecology; Pliensbachian; Shallow-water carbonates; Shell accumulations; Taphonomy
语种	英语
scopus关键词	bivalve; carbonate; Jurassic; morphology; paleoecology; Pliensbachian; quantitative analysis; shallow water; shell; shell bed; taphonomy; Italy; Trentino-Alto Adige; Trento; Bivalvia; Lithiotidae
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/150957
作者单位	Dipartimento di Fisica e Scienze della Terra, Università degli Studi di Ferrara, via Saragat 1, Ferrara, 44122, Italy; Department of Geosciences, University of Tübingen, Sigwartstr. 10, Tübingen, 72076, Germany
推荐引用方式 GB/T 7714	Brandolese V.,Posenato R.,Nebelsick J.H.,et al. Distinguishing core and flank facies based on shell fabrics in Lower Jurassic lithiotid shell beds[J],2019,526.
APA	Brandolese V.,Posenato R.,Nebelsick J.H.,&Bassi D..(2019).Distinguishing core and flank facies based on shell fabrics in Lower Jurassic lithiotid shell beds.Palaeogeography, Palaeoclimatology, Palaeoecology,526.
MLA	Brandolese V.,et al."Distinguishing core and flank facies based on shell fabrics in Lower Jurassic lithiotid shell beds".Palaeogeography, Palaeoclimatology, Palaeoecology 526(2019).