气候变化领域集成服务门户(CCPortal): Crowded tubular tidalites in Miocene shelf sandstones of southern Iberia

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DOI	10.1016/j.palaeo.2019.02.012
	Crowded tubular tidalites in Miocene shelf sandstones of southern Iberia
	Rodríguez-Tovar F.J.; Mayoral E.; Santos A.; Dorador J.; Wetzel A.
发表日期	2019
ISSN	0031-0182
起始页码	1
结束页码	9
卷号	521
英文摘要	The passive and active fill of burrows potentially stores information about sedimentary processes that are otherwise not preserved in the rock record. In recent years, abandoned passively-filled vertical burrows were introduced as “tubular tidalites” when their infilling displays rhythmic lamination reflecting a tidal signature. In the shallow-marine Miocene sandstones exposed at Oura (southern Portugal), 36 tubular tidalites occur in a 1.5 m-thick interval. Their high abundance is likely a consequence of both an environment favourable for the production of open burrows in a tidal setting, and post-depositional conditions facilitating the preservation of the tubular tidalites. Besides vertical tubes, 13 horizontal burrows preserve a tidal signature indicating draught-fill processes. All specimens belong to Thalassinoides and, for the first time, to Gyrolithes. The rhythmic infill of two well-preserved specimens shows two significant features: (1) The thickness pattern allows for differentiation into groups having 7 couplets (consisting of a dark and a light lamina) or multiples thereof, and (2) the thickness patterns of both, consecutive couplets as well as dark and light laminae match sine curves. Both patterns indicate a diurnal tidal cyclicity. The tidalites record up to four spring-tide and three neap-tide cycles. In addition to the neap-spring cycles, a long-period lunar fortnightly tide regime can be envisaged. The tubular tidalites imply diurnal tides during the Miocene in contrast to the Recent semidiurnal tides affecting southern Portugal. © 2019 Elsevier B.V.
英文关键词	Algarve (Portugal); Gyrolithes; Lunar fortnightly regime; Miocene; Neap-spring cycles; Thalassinoides; Tidal processes
语种	英语
scopus关键词	abundance; differentiation; lamination; Miocene; sandstone; tidal cycle; trace fossil; type specimen; Iberian Peninsula; Portugal; Gyrolithes; Thalassinoides
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/151014
作者单位	Departamento de Estratigrafía y Paleontología, Universidad de Granada, Granada, 18071, Spain; Departamento de Ciencias de la Tierra, Facultad de Ciencias Experimentales, Universidad de Huelva, Campus de El Carmen, Avda. 3 de Marzo, s/n, Huelva, 21071, Spain; CCTH - Centro de Investigación Científico Tecnológico, Universidad de Huelva, Avda. 3 de Marzo, s/n, Huelva, 21071, Spain; Department of Earth Sciences, Royal Holloway Univ. London, Egham, Surrey, TW20 0EX, United Kingdom; Department of Environmental Sciences – Geology, University of Basel, Bernoullistrasse 32, Basel, CH-4056, Switzerland
推荐引用方式 GB/T 7714	Rodríguez-Tovar F.J.,Mayoral E.,Santos A.,et al. Crowded tubular tidalites in Miocene shelf sandstones of southern Iberia[J],2019,521.
APA	Rodríguez-Tovar F.J.,Mayoral E.,Santos A.,Dorador J.,&Wetzel A..(2019).Crowded tubular tidalites in Miocene shelf sandstones of southern Iberia.Palaeogeography, Palaeoclimatology, Palaeoecology,521.
MLA	Rodríguez-Tovar F.J.,et al."Crowded tubular tidalites in Miocene shelf sandstones of southern Iberia".Palaeogeography, Palaeoclimatology, Palaeoecology 521(2019).