气候变化领域集成服务门户(CCPortal): Bioerosion pattern in a nearshore setting as a tool to disentangle multiphase transgressive episodes

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DOI	10.1016/j.palaeo.2020.109820
	Bioerosion pattern in a nearshore setting as a tool to disentangle multiphase transgressive episodes
	Giannetti A.; Falces-Delgado S.; Baeza-Carratalá J.F.
发表日期	2020
ISSN	0031-0182
卷号	554
英文摘要	Palaeoichnology is known to be a powerful tool for the characterisation of unconformity surfaces. In a Neogene post-orogenic basin of the Betic domain (Alicante, SE Spain), a complex Miocene transgressive event on an exposed Eocene succession is recorded. The resulting unconformity surface as well as the overlying beds resulting from the establishment of a nearshore environment are ichnologically and palaeoecologically analysed. Different boring structures related to the Entobia ichnofacies were observed on a variety of substrates, including i) the rocky Eocene substrate, ii) Tortonian conglomerates and breccias, iii) oyster and coral patches (mainly represented by Tarbellastraea). Boring structures are mainly represented by Gastrochaenolites, Entobia and, more rarely, Trypanites and Spirolites? Different colonization patterns were identified, including truncated Gastrochaenolites and Entobia that are extensively developed on the Eocene rockground, small-sized Entobia, and superficial bioerosion on conglomerates and breccias, and Gastrochaenolites hospitium on corals; a selective colonization of G. hospitium was observed, with Tarbellastraea much more intensively bioeroded than Porites. Finally, the integration of stratigraphic, palaeoecological and ichnological data allowed for the identification of three different phases in the Miocene transgression: i) slow transgression with the consequent colonization of the Eocene rockground, the production of a wide planar surface and the truncated Gastrochaenolites-Entobia assemblage; ii) the breaking of this uniform coastal setting into areas characterized by different hydrodynamics, with coral development where turbulence was higher; this second phase was of limited temporal extension, with a limited accommodation space; iii) a final phase characterized by a new transgressive pulse leading to the establishment firstly of a restricted inner platform and secondarily of a slightly deeper sandy platform; in this phase, bioerosion was limited to shells, while soft- and loose-ground burrows as Ophiomorpha developed within the substrate. © 2020 Elsevier B.V.
英文关键词	Entobia; Gastrochaenolites; Miocene; Spain; Tarbellastraea; Transgression
语种	英语
scopus关键词	bioerosion; colonization; ichnofacies; ichnology; Miocene; nearshore environment; Neogene; succession; Tortonian; transgression; unconformity; Alicante [Alicante (PRV)]; Alicante [Comunidad Valencia]; Comunidad Valencia; Spain; Anthozoa; Entobia; Gastrochaenolites; Ostreidae; Porites; Trypanites
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/150434
作者单位	Departamento de Ciencias de la Tierra y del medio Ambiente, Universidad de Alicante, Apdo. 99, Alicante, 03080, Spain
推荐引用方式 GB/T 7714	Giannetti A.,Falces-Delgado S.,Baeza-Carratalá J.F.. Bioerosion pattern in a nearshore setting as a tool to disentangle multiphase transgressive episodes[J],2020,554.
APA	Giannetti A.,Falces-Delgado S.,&Baeza-Carratalá J.F..(2020).Bioerosion pattern in a nearshore setting as a tool to disentangle multiphase transgressive episodes.Palaeogeography, Palaeoclimatology, Palaeoecology,554.
MLA	Giannetti A.,et al."Bioerosion pattern in a nearshore setting as a tool to disentangle multiphase transgressive episodes".Palaeogeography, Palaeoclimatology, Palaeoecology 554(2020).