Latest Ordovician age of the Spinachitina fragilis Chitinozoan Biozone in Baltoscandia

doi:10.3176/earth.2023.5

	Latest Ordovician age of the Spinachitina fragilis Chitinozoan Biozone in Baltoscandia
	Nolvak, Jaak 1; Liang, Yan 2; Hints, Olle 1
刊名	ESTONIAN JOURNAL OF EARTH SCIENCES
	2023
卷号	72 期号:1 页码:82-85
关键词	chitinozoans biostratigraphy Ordovician-Silurian boundary beds East Baltic
ISSN号	1736-4728
DOI	10.3176/earth.2023.5
通讯作者	Nolvak, Jaak(jaak.nolvak@taltech.ee)
英文摘要	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.
资助项目	Estonian Research Council[PRG1701]
WOS关键词	EARLY SILURIAN CHITINOZOANS ; BIOSTRATIGRAPHY ; ACRITARCHS
WOS研究方向	Geology
语种	英语
出版者	ESTONIAN ACAD PUBLISHERS
WOS记录号	WOS:001015399200006
资助机构	Estonian Research Council
内容类型	期刊论文
源URL	[http://ir.nigpas.ac.cn/handle/332004/42479]
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.