Latest Ordovician age of the Spinachitina fragilis Chitinozoan Biozone in Baltoscandia

doi:10.3176/earth.2023.5

NIGPAS OpenIR

	Latest Ordovician age of the Spinachitina fragilis Chitinozoan Biozone in Baltoscandia
通讯作者	Nolvak, Jaak([email protected])
	Nolvak, Jaak 1; Liang, Yan 2; Hints, Olle 1
	2023
发表期刊	ESTONIAN JOURNAL OF EARTH SCIENCES
ISSN	1736-4728
卷号	72 期号:1 页码:82-85
摘要	The global Spinachitina fragilis Chitinozoan Biozone has been considered the lower most Silurian zone in most publications. S. fragilis was first described from the Ohesaare drill core, Estonia, and utilised as a Baltic regional zonal taxon together with Ancyrochitina laevaensis. Despite its wide geographical occurrence, S. fragilis has remained poorly documented in its type region. This has created confusion in taxonomy and distribution of the species. Herein, we have restudied material from the type locality and supplementary sections in the East Baltic region. S. fragilis generally has a very short stratigraphic range, which, according to new data on carbon isotope chemostratigraphy, coincides with the falling limb of the Hirnantian carbon isotope excursion. This suggests the latest Hirnantian rather than the early Rhuddanian age of the Spinachitina fragilis Chitinozoan Biozone in Baltoscandia. Based on this view, we revise the latest Ordovician chitinozoan biozonal scheme for the region. Globally, the S. fragilis Biozone may span across the Ordovician-Silurian boundary.
关键词	chitinozoans biostratigraphy Ordovician-Silurian boundary beds East Baltic
DOI	10.3176/earth.2023.5
收录类别	SCI
语种	英语
关键词[WOS]	EARLY SILURIAN CHITINOZOANS ; BIOSTRATIGRAPHY ; ACRITARCHS
资助项目	Estonian Research Council[PRG1701]
WOS研究方向	Geology
WOS类目	Geology ; Geosciences, Multidisciplinary
WOS记录号	WOS:001015399200006
项目资助者	Estonian Research Council
出版者	ESTONIAN ACAD PUBLISHERS
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/42480
专题	中国科学院南京地质古生物研究所
通讯作者	Nolvak, Jaak
作者单位	1.Tallinn Univ Technol, Dept Geol, Ehitajate 5, EE-19086 Tallinn, Estonia 2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, 39 East Beijing Rd, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Nolvak, Jaak,Liang, Yan,Hints, Olle. Latest Ordovician age of the Spinachitina fragilis Chitinozoan Biozone in Baltoscandia[J]. ESTONIAN JOURNAL OF EARTH SCIENCES,2023,72(1):82-85.
APA	Nolvak, Jaak,Liang, Yan,&Hints, Olle.(2023).Latest Ordovician age of the Spinachitina fragilis Chitinozoan Biozone in Baltoscandia.ESTONIAN JOURNAL OF EARTH SCIENCES,72(1),82-85.
MLA	Nolvak, Jaak,et al."Latest Ordovician age of the Spinachitina fragilis Chitinozoan Biozone in Baltoscandia".ESTONIAN JOURNAL OF EARTH SCIENCES 72.1(2023):82-85.