Oligocene and early middle Miocene diatom biostratigraphy of Hole 884B
Oligocene and early middle Miocene diatom biostratigraphy of Hole 884B
复制标题
884B孔渐新世和早中新世硅藻生物地层
DOI：
10.2973/odp.proc.sr.145.105.1995
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发表时间：
1995
影响因子：
3.7
通讯作者：
J. Barron
中科院分区：
文献类型：
--
作者：
A. Gladenkov;J. Barron
根据西北太平洋底特律海山东侧884 B孔硅藻分类群的地层记录和图解，提出了北太平洋渐新世至早中新世硅藻分带。884 B孔剖面在北太平洋是独一无二的，因为它包含了近3000万年来几乎连续的硅藻沉积记录。古地磁地层学可用于过去19-20百万年。这一记录。Rocella vigilans（-30.2 Ma）、Cavitatus rectus（-29.6 Ma）、Rocella gelida（-28.3 Ma）、Thalassiosira praefraga sp. nov.（-24.0 Ma）、Thalassiosira fraga（20.3 Ma）、Crucidenticula sawamurae（18.4 Ma）和Crucidenticula kanayae（16.9 Ma）的连续化石年代是提出具有相同连续名称的部分分布区的基础。Praelauta、D. lauta和D.在884 B孔中中新世下部的上覆沉积物中识别出透明带。1新种：海链藻Thalassiosira praefraga A. Gladenkov et巴伦新种Gladenkov et Barron sp. nov.，本文提出
An Oligocene through early Miocene diatom zonation is proposed for the North Pacific based on the stratigraphic documentation and illustration of diatom taxa from Hole 884B on the eastern flank of Detroit Seamount in the northwest Pacific. The Hole 884B section is unique in the North Pacific because it contains a nearly continuous record of diatom sedimentation covering the last 30 m.y. Paleomagnetic stratigraphy is available for the last 19-20 m.y. of that record. The successive FOs of Rocella vigilans (-30.2 Ma), Cavitatus rectus (-29.6 Ma), Rocella gelida (-28.3 Ma), Thalassiosira praefraga sp. nov. (-24.0 Ma), Thalassiosira fraga (20.3 Ma), Crucidenticula sawamurae (18.4 Ma), and Crucidenticula kanayae (16.9 Ma) are the basis for proposing partial range zones with the same successive names. The Denticulopsis praelauta, D. lauta, and D. hyalina zones are recognized in the overlying lower middle Miocene sediments in Hole 884B. One new species, Thalassiosira praefraga A. Gladenkov et Barron sp. nov., is proposed.