气候变化领域集成服务门户(CCPortal): Dinosaur-landscape interactions at a diverse Early Cretaceous tracksite (Lee Ness Sandstone; Ashdown Formation; southern England)

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DOI	10.1016/j.palaeo.2018.11.018
	Dinosaur-landscape interactions at a diverse Early Cretaceous tracksite (Lee Ness Sandstone; Ashdown Formation; southern England)
	Shillito A.P.; Davies N.S.
发表日期	2019
ISSN	0031-0182
起始页码	593
结束页码	612
卷号	514
英文摘要	An assemblage of dinosaur footprints is reported from the Lower Cretaceous (Berriasian-Valanginian) Ashdown Formation of East Sussex, southern England. The ichnofauna is concentrated around a 2 m thick stratigraphic marker, the Lee Ness Sandstone, where recent cliff retreat has revealed 85 recognisable footprints attributable to 13 morphotypes, many of which bear high-fidelity skin impressions. The newly identified morphotypes mean that this tracksite hosts one of the most diverse dinosaur ichnoassemblages in the well-documented Mesozoic record of Britain; recording the activity of theropod, ornithopod, thyreophoran and possibly sauropod tracemakers. Most of the footprints were emplaced on a single floodplain mudstone horizon beneath a fluvial crevasse splay sandstone, where preservation was favoured by cohesive sediment and a prolonged interval of sedimentary stasis, during which trackways could be imparted. The sedimentological context of the trackways reveals evidence of interactions between dinosaurs and the riverine landscape that they inhabited; including the development of microtopographies around footprints, which impacted invertebrate burrowing activity, and evidence for dinosaur wading below the bankfull level of small meandering channels and oxbow lakes. Modern analogue suggests that the large dinosaurs may have played a significant role as zoogeomorphic engineers within the ancient floodplain setting, but the imperfect translation of sedimentary environment to sedimentary rock means that geological evidence for such is ambiguous. © 2018 Elsevier B.V.
英文关键词	Floodplain; Fluvial; Footprint; Ichnology; Wealden; Zoogeomorphology
语种	英语
scopus关键词	burrowing; cohesionless sediment; Cretaceous; dinosaur; floodplain; footprint; geomorphology; ichnology; invertebrate; Mesozoic; microtopography; morphotype; mudstone; preservation; sandstone; trackway; East Sussex; England; United Kingdom; United Kingdom; Dinosauria; Invertebrata; Ornithopoda; Sauropoda; Theropoda
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/151133
作者单位	Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EQ, United Kingdom
推荐引用方式 GB/T 7714	Shillito A.P.,Davies N.S.. Dinosaur-landscape interactions at a diverse Early Cretaceous tracksite (Lee Ness Sandstone; Ashdown Formation; southern England)[J],2019,514.
APA	Shillito A.P.,&Davies N.S..(2019).Dinosaur-landscape interactions at a diverse Early Cretaceous tracksite (Lee Ness Sandstone; Ashdown Formation; southern England).Palaeogeography, Palaeoclimatology, Palaeoecology,514.
MLA	Shillito A.P.,et al."Dinosaur-landscape interactions at a diverse Early Cretaceous tracksite (Lee Ness Sandstone; Ashdown Formation; southern England)".Palaeogeography, Palaeoclimatology, Palaeoecology 514(2019).