Graptolite evidence for the ages of the Sofala Volcanics and Willow Glen Formation, northern Capertee High, NSW

被引：5
作者：
Rickards, RB
Wright, AJ
Pemberton, JW
机构：
[1] Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England
[2] Univ Wollongong, Sch Geosci, Wollongong, NSW 2522, Australia
来源：
ALCHERINGA | 1998年 / 22卷 / 3-4期
关键词：
graptolites; biostratigraphy; Ordovician; Silurian; Cudgegong; NSW;
D O I：
10.1080/03115519808619201
中图分类号：
Q91 [古生物学];
学科分类号：
0709 ; 070903 ;
摘要：
New finds of graptolites in the Cudgegong district N.S.W., indicate a Bo3 (mid-Bolindian: Late Ordovician) age for the upper part of the Sofala Volcanics and an early Pridoli (Late Silurian) age for the upper part of the Willow Glen Formation. The Silurian graptolite is described as Monograptus parultimus minutus subsp. nov. Integration of the new biostratigraphic data with SHRIMP ages for volcanic units in the Cudgegong sequence supports an age of 410 Ma for the Silurian-Devonian boundary.
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页码：223 / 230
页数：8
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