气候变化领域集成服务门户(CCPortal): Life in near-anoxic conditions: A case study of the ichnology and infaunal ecology of Silurian graptolitic black shales from Sardinia; Italy

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DOI	10.1016/j.palaeo.2020.109889
	Life in near-anoxic conditions: A case study of the ichnology and infaunal ecology of Silurian graptolitic black shales from Sardinia; Italy
	Baucon A.; Corradini C.; Floris M.; Briguglio A.; Cabella R.; Campomenosi N.; Piazza M.; Corriga M.G.
发表日期	2020
ISSN	0031-0182
卷号	556
英文摘要	A trace fossil assemblage from the Silurian (Llandovery) black shales of the Genna Muxerru Formation is reported for the first time. The ichnofossil record is abundant, well-preserved and comprises Alcyonidiopsis, Cochlichnus, Phymatoderma, Planolites (large morphotype), Planolites (rough morphotype) and a ‘Small chondritid’. Sedimentological and ichnological evidence indicates that the bioturbated black shales were deposited in outer shelf (or deeper) settings with severe depletion in oxygen. The seafloor provided a high food supply for the infauna. The palaeoenvironment of the Genna Muxerru Formation is an ancient analogue of modern oxygen-minimum zones. Burrow fills are apparently massive in macroscopic view, whereas observations under the petrographic and stereoscopic microscope show that a lifestyle dominated, i.e. that of pellet-filling sediment-feeders. As such, the Genna Muxerru Formation provides not only a new ethologic reference for low-oxygen settings but also a methodological benchmark for ichnological analysis of black shales. Bioturbation in black shales may be commoner than expected but its recognition requires microscopic observation. © 2020 Elsevier B.V.
英文关键词	Benthos; Dysoxia; Ichnofossils; Oxygen minimum zones; Oxygenation
语种	英语
scopus关键词	anoxic conditions; black shale; food supply; fossil assemblage; graptolite; ichnology; morphotype; oxygen minimum layer; paleoenvironment; seafloor; sedimentology; Silurian; trace fossil; Italy; Sardinia; Cochlichnus; Planolites
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/150376
作者单位	DISTAV, University of Genova, Corso Europa 26, Genova, 16132, Italy; Dipartimento di Matematica e Geoscienze, Università di Trieste, via Weiss 2, Trieste, 34128, Italy; Dipartimento di Scienze Chimiche e Geologiche, Università di Cagliari, Cittadella Universitaria (Blocco A) - SS.554 bivio per Sestu, Monserrato, CA 09042, Italy; via Principe di Napoli 15, Gonnosfanadiga (SU), 09035, Italy
推荐引用方式 GB/T 7714	Baucon A.,Corradini C.,Floris M.,et al. Life in near-anoxic conditions: A case study of the ichnology and infaunal ecology of Silurian graptolitic black shales from Sardinia; Italy[J],2020,556.
APA	Baucon A..,Corradini C..,Floris M..,Briguglio A..,Cabella R..,...&Corriga M.G..(2020).Life in near-anoxic conditions: A case study of the ichnology and infaunal ecology of Silurian graptolitic black shales from Sardinia; Italy.Palaeogeography, Palaeoclimatology, Palaeoecology,556.
MLA	Baucon A.,et al."Life in near-anoxic conditions: A case study of the ichnology and infaunal ecology of Silurian graptolitic black shales from Sardinia; Italy".Palaeogeography, Palaeoclimatology, Palaeoecology 556(2020).