The latest Ordovician Hirnantia Fauna (Brachiopoda) in time and space
Rong, JY (戎嘉余); Xu, C (陈旭); Harper, DAT
2002-09-01
发表期刊LETHAIA
ISSN0024-1164
卷号35期号:3页码:231-249
摘要

The diachronous temporal and spatial distribution of the Hirnantia brachiopod fauna and the complicated pattern of terminal Ordovician events are documented through biostratigraphical analysis of the Ordovician-Silurian boundary strata in S China, Sibumasu, Xizang and elsewhere. The duration of these events (longer than the half Myr derived from isotopic excursions) indicates that they were not abrupt and instantaneous. The presence of some core taxa of the Hirnantia fauna in the upper P. pacificus Biozone (known from their earliest Occurrence in China) signals the start of increased water ventilation due to the invasion of cool water across the Yangtze Basin. Low- and higher-diversity Hirnantia faunas related to onshore, shallow-water and to offshore, deeper-water environments, respectively, developed first in the basal and upper N. extraordinarius-N. ojsuensis Biozone. Disappearance of most of the fauna in the early N. persculptus Biozone suggests that the glacial maximum started to decline. The presence of the Hirnantia fauna in the Upper N. persculptus to the lower P. acuminatus biozones indicates the continuation of cool water environments in sonic places. The diachronous disappearance of deteriorating environments (earlier in later Hirnantian and finally in the early Rhuddanian) is associated with geographical heterogeneity. Occurrences of atrypids, pentamerids and spiriferids along with key elements of the Hirnantia fauna in N Guizhou provide a link between the Late Ordovician radiation and Early Silurian recovery of these major brachiopod groups.

关键词Diachroneity Hirnantia Fauna Latest Ordovician Mass Extinction
语种英语
关键词[WOS]Marine Fossil Record ; Oslo-asker District ; Silurian Boundary ; Mass Extinctions ; South China ; Glaciation ; Graptolite ; Recovery ; Norway ; Region
WOS研究方向Paleontology
WOS类目Paleontology
WOS记录号WOS:000178776500003
出版者TAYLOR & FRANCIS AS
文献类型期刊论文
条目标识符http://ir.nigpas.ac.cn/handle/332004/1195
专题中国科学院南京地质古生物研究所
其他
通讯作者Rong, JY (戎嘉余)
作者单位1.Acad Sinica, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China
2.Univ Copenhagen, Geol Museum, DK-1350 Copenhagen K, Denmark
推荐引用方式
GB/T 7714
Rong, JY ,Xu, C ,Harper, DAT. The latest Ordovician Hirnantia Fauna (Brachiopoda) in time and space[J]. LETHAIA,2002,35(3):231-249.
APA Rong, JY ,Xu, C ,&Harper, DAT.(2002).The latest Ordovician Hirnantia Fauna (Brachiopoda) in time and space.LETHAIA,35(3),231-249.
MLA Rong, JY ,et al."The latest Ordovician Hirnantia Fauna (Brachiopoda) in time and space".LETHAIA 35.3(2002):231-249.
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