气候变化领域集成服务门户(CCPortal): Factors affecting the preservation and distribution of cetaceans in the lower Miocene Gaiman Formation of Patagonia; Argentina

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DOI	10.1016/j.palaeo.2019.03.013
	Factors affecting the preservation and distribution of cetaceans in the lower Miocene Gaiman Formation of Patagonia; Argentina
	Cuitiño J.I.; Buono M.R.; Viglino M.; Farroni N.D.; Bessone S.
发表日期	2019
ISSN	0031-0182
起始页码	110
结束页码	125
卷号	526
英文摘要	Factors affecting cetacean preservation and distribution in ancient sedimentary successions are not well understood. Actualistic studies have focused on coastal and deep marine examples, and little is known about taphonomic processes occurring within shelf environments. In this paper, we integrate sedimentological, taphonomic and palaeontological data for the cetacean-bearing lower Miocene Gaiman Formation from Patagonia, Argentina, to analyse which factors affected the distribution and preservation of cetaceans in several localities of the Southwestern Atlantic. Facies analysis shows that the formation represents a transgressive-regressive stratigraphic cycle, with palaeoenvironments including coastal, storm-dominated shoreface, inner shelf embayment and open inner shelf. Cetacean remains show preservation styles varying from isolated elements to articulated specimens, with nearly all remains restricted to both embayment and open marine inner shelf settings. Two fossil cetacean assemblages are recognized: Assemblage A comprises small-sized odontocetes dominated by Platanistoidea, preserved mostly in inner shelf embayment deposits; and Assemblage B comprises large-sized odontocetes and mysticetes, dominated by Physeteroidea and Balaenopteroidea, preserved mostly in open inner shelf deposits. Cetacean preservation style is controlled by a combination of palaeoenvironmental conditions, such as energy and sedimentation rate, and by biological factors, such as cetacean body plan and its impact on carcass buoyancy. Ecological factors may also explain the stratigraphic distribution of cetaceans between coastal and oceanic assemblages. This novel integrative and multidisciplinary analyses improves our knowledge of cetacean taphonomy in shelf environments. © 2019 Elsevier B.V.
英文关键词	Argentina; Inner shelf; Palaeoenvironments; Patagonia; Sedimentology; Taphonomy
语种	英语
scopus关键词	continental shelf; crustacean; environmental factor; fossil assemblage; fossil record; Miocene; paleoenvironment; preservation; sedimentology; spatial distribution; taphonomy; transgression-regression cycle; Argentina; Atlantic Ocean; Atlantic Ocean (Southwest); Patagonia; Cetacea
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/150952
作者单位	Instituto Patagónico de Geología y Paleontología (IPGP, CCT CONICET-CENPAT), Boulevard Brown 2915, Puerto Madryn, Chubut 9120, Argentina; Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires. Ciudad Universitaria, Pabellón 2, 1° Piso (1428), Ciudad Autónoma de Buenos Aires, Argentina
推荐引用方式 GB/T 7714	Cuitiño J.I.,Buono M.R.,Viglino M.,et al. Factors affecting the preservation and distribution of cetaceans in the lower Miocene Gaiman Formation of Patagonia; Argentina[J],2019,526.
APA	Cuitiño J.I.,Buono M.R.,Viglino M.,Farroni N.D.,&Bessone S..(2019).Factors affecting the preservation and distribution of cetaceans in the lower Miocene Gaiman Formation of Patagonia; Argentina.Palaeogeography, Palaeoclimatology, Palaeoecology,526.
MLA	Cuitiño J.I.,et al."Factors affecting the preservation and distribution of cetaceans in the lower Miocene Gaiman Formation of Patagonia; Argentina".Palaeogeography, Palaeoclimatology, Palaeoecology 526(2019).