Middle Ordovician Conodont Biostratigraphy of Australasia  

作　　者：Yong Yi Zhen 

机构地区：[1]W.B.Clarke Geoscience Centre,Geological Survey of New South Wales,Londonderry NSW 2753,Australia

出　　处：《Journal of Earth Science》2021年第3期474-485,共12页地球科学学刊（英文版）

基　　金：funded by the Geological Survey of New South Wales。

摘　　要：Seven conodont biozones are recognized in the carbonate-dominated shelf-marine Middle Ordovician developed in the intracratonic sedimentary basins(Canning,Amadeus and Georgina)of central and north-western Australia,in the Lachlan and New England orogens of New South Wales,and in the Takaka Terrane of New Zealand.A separate scheme identifying seven conodont biozones spanning the Middle Ordovician has also been developed for siliciclastic sequences deposited in slopebasinal environments in the Lachlan Orogen in New South Wales and Victoria.This biozonal classification consisting of two parallel biostratigraphic schemes for the shelf-marine and deep-marine successions respectively has significantly increased precision in regional and global biostratigraphic correlation and laid a solid foundation for the Middle Ordovician chronostratigraphy of Australia and New Zealand.Recognition of short-ranging pandemic species as the eponymous species of the biozones also supports direct correlation with the classical conodont successions established in Baltoscandia and the North American Midcontinent,and with those of the major Chinese terranes(South and North China and Tarim).The Lachlan Orogen appears to be globally unique in enabling correlation of contemporaneous conodont faunas over a considerable spectrum of water depths and biofacies ranging from carbonate shelves,slopes to deep-water basins.

关 键 词：CONODONT ORDOVICIAN CORRELATION AUSTRALIA New Zealand 

分 类 号：Q911[天文地球—古生物学与地层学] P539[生物学—古生物学]