气候变化领域集成服务门户(CCPortal): A Late Maeotian age (6.7–6.3 Ma) for the enigmatic “Pebbly Breccia” unit in DSDP Hole 380A of the Black Sea

CCPortal

DOI	10.1016/j.palaeo.2019.109269
	A Late Maeotian age (6.7–6.3 Ma) for the enigmatic “Pebbly Breccia” unit in DSDP Hole 380A of the Black Sea
	Golovina L.A.; Radionova E.P.; van Baak C.G.C.; Krijgsman W.; Palcu D.V.
发表日期	2019
ISSN	0031-0182
卷号	533
英文摘要	Various hypotheses exist on the age and origin of the so-called “Pebbly Breccia” unit in the deep-sea record of DSDP Hole 380A of the Euxinian (Black Sea) Basin. Here, we present a detailed study of diatom and nannofossil assemblages of Hole 380A. Our diatom records show a characteristic sequence of appearance of markers species, which we can correlate to the recently established bio-magnetostratigraphic time frame of the Zheleznyi Rog section on the Black Sea coast of the Taman Peninsula (Russia). It shows that the Pebbly Breccia is sandwiched between Upper Maeotian deposits, and must have been deposited at an age between 6.7 and 6.3 Ma. The appearance of nannoplankton and the marine diatom association at above the Pebbly breccia (Unit IVc) suggests a short-term incursion of marine conditions. The age of Unit IVc, based on diatom data, is 6.3–6.1 Ma. The nannoplankton record is mainly represented by species that do not have stratigraphic value. The previously reported presence of Ceratolithus acutus in the Black Sea is explained by misinterpretation of destructed elements of ascidian spicules. We conclude that the Pebbly Breccia is not related to a desiccated Black Sea at Messinian Salinity Crisis times, but it corresponds to a late Maeotian episode of gravitational instability in the SW Black Sea region. © 2019 Elsevier B.V.
英文关键词	Ceratolithus acutus; Desiccation; Diatoms; Mass transport; Messinian; Paratethys
语种	英语
scopus关键词	age structure; breccia; Deep Sea Drilling Project; desiccation; diatom; mass transport; Messinian; nanofossil; nanoplankton; Black Sea; Krasnodar [Russian Federation]; Russian Federation; Taman Peninsula; Ascidia; Bacillariophyta; Ceratolithus; Nitzschia alba
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/150815
作者单位	Geological Institute, Russian Academy of Sciences, Pyzhevsky per. 7, Moscow, 119017, Russian Federation; Paleomagnetic Laboratory Fort Hoofddijk, Dept. of Earth Sciences, Utrecht University, Netherlands; CASP, West Building, Madingley Rise, Madingley Road, Cambridge, CB3 0UD, United Kingdom; Instituto Oceanográfico, Universidade de São Paulo, Praça do Oceanográfico, 191, São Paulo, 05508-120, Brazil
推荐引用方式 GB/T 7714	Golovina L.A.,Radionova E.P.,van Baak C.G.C.,等. A Late Maeotian age (6.7–6.3 Ma) for the enigmatic “Pebbly Breccia” unit in DSDP Hole 380A of the Black Sea[J],2019,533.
APA	Golovina L.A.,Radionova E.P.,van Baak C.G.C.,Krijgsman W.,&Palcu D.V..(2019).A Late Maeotian age (6.7–6.3 Ma) for the enigmatic “Pebbly Breccia” unit in DSDP Hole 380A of the Black Sea.Palaeogeography, Palaeoclimatology, Palaeoecology,533.
MLA	Golovina L.A.,et al."A Late Maeotian age (6.7–6.3 Ma) for the enigmatic “Pebbly Breccia” unit in DSDP Hole 380A of the Black Sea".Palaeogeography, Palaeoclimatology, Palaeoecology 533(2019).