Upper Llandovery (Telychian) graptolites of the Oktavites spiralis Biozone from the Long Dai Formation, at Lam Thuy village, Quang Binh Province, central Vietnam
Upper Llandovery (Telychian) graptolites of the Oktavites spiralis Biozone from the Long Dai Formation, at Lam Thuy village, Quang Binh Province, central Vietnam
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越南中部广平省 Lam Thuy 村 Long Dai 地层 Oktavitesspiralis 生物带的上兰多弗里（Telychian）笔石
DOI：
10.1139/cjes-2015-0153
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发表时间：
2017
影响因子：
1.4
通讯作者：
Vincent Perrier
中科院分区：
文献类型：
--
作者：
Mark Williams;Toshifumi Komatsu;Gengo Tanaka;Nguyen Huu Hung;Jan Zalasiewicz;Thijs R. A. Vandenbroucke;Simon Wallis;Vincent Perrier
越南中部广平省黎水县西南部Lam Thuy村龙代组的一个数量较小的笔石组合包括Oktavites spiralis（Geinitz）。该物种在组合中的相对丰度，加上其与Oktavites bodentoerlensisLochell的出现，确定了下志留纪（Llandovery系列，Telychian阶段）spiralisgraptolite生物带。Lam Thuy新地点的确定增强了越南中部志留纪含笔石地点的数据集，并证实了笔石组合在越南北方和中部下古生代地层生物地层对比中的广泛用途。
A numerically small graptolite assemblage from the Long Dai Formation at Lam Thuy village, southwestern Le Thuy district, Quang Binh Province, central Vietnam, includesOktavites spiralis(Geinitz). The relative abundance of this species in the assemblage, coupled to its occurrence withOktavites bodentoerlensisLoydell, identifies the lower Silurian (Llandovery Series, Telychian Stage)spiralisgraptolite Biozone. Identification of the new locality at Lam Thuy enhances the dataset of Silurian graptolite-bearing localities in central Vietnam and advertises the wide utility of graptolite assemblages for biostratigraphical correlation of lower Palaeozoic strata in northern and central Vietnam.