Cambrian trilobites from Northern Victoria Land, Antarctica, and their stratigraphic implications
Cambrian trilobites from Northern Victoria Land, Antarctica, and their stratigraphic implications
复制标题
DOI：
10.1080/00288306.1996.9514720
复制
发表时间：
1996-09
影响因子：
2.2
通讯作者：
R. Cooper;J. Jago;J. Begg
中科院分区：
文献类型：
--
作者：
R. Cooper;J. Jago;J. Begg
摘要描述了北方维多利亚地鲍尔斯地体15个新地点的54个三叶虫分类群，包括第一批臼齿组化石。这些化石表明其时代范围为中寒武世晚期（Boomerangian或更早）至晚寒武世中期（Idamean晚期）。在赖利岭，马刺组以许多断层为界的切片出现;新的化石表明切片之间存在明显的横向相对比，并表明沿边界断层有相当大的横向位移沿着。在霍利斯顿冰川，Mindyallan年龄的三叶虫在臼齿组意味着臼齿和马刺组之间的边界是强烈的时间海侵。新种为Reillopleura braddocki gen. et sp. nov.和Notoaphelaspis horizontalis sp. nov.。
Abstract Fifty‐four trilobite taxa from 15 new localities in the Bowers Terrane of Northern Victoria Land, including the first fossils from Molar Formation, are described. The fossils indicate an age range from late Middle Cambrian (Boomerangian or older) to mid Late Cambrian (late Idamean). At Reilly Ridge, the Spurs Formation crops out in a number of fault‐bounded slices; the new fossils indicate marked lateral facies contrasts between slices and suggest considerable lateral displacement along the bounding faults. At Houliston Glacier, trilobites of Mindyallan age in Molar Formation imply that the boundary between the Molar and Spurs Formations is strongly time transgressive. New species described in this paper are Reillopleura braddocki gen. et sp. nov. and Notoaphelaspis horizontalis sp. nov. Faunal affinities are mainly with the Ellsworth Mountains (West Antarctica), western Queensland, and China.