• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Paleogene-Early Neogene Palynomorphs from the Eastern Equatorial Atlantic and Southeastern Florida, USA: Biostratigraphy and Paleoenvironmental Implications
【24h】

Paleogene-Early Neogene Palynomorphs from the Eastern Equatorial Atlantic and Southeastern Florida, USA: Biostratigraphy and Paleoenvironmental Implications

机译：美国东赤道大西洋和佛罗里达州东南部的古近纪新近纪类岩体：生物地层学和古环境意义

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The transition from greenhouse conditions (Paleocene-Eocene Thermal Maximum, PETM) to icehouse conditions (Early Oligocene) is not well documented in tropical-subtropical regions. One hundred and five samples from Ocean Drilling Program (ODP) Site 959 (Hole 959A and Hole 959D) in the Cote d'Ivoire-Ghana Transform Margin, Alo-1 Well in the northern Niger Delta (Anambra) Basin, Nigeria, and W-17001 in southeastern Florida were studied for their palynological contents. Dinoflagellate cysts were mainly utilized for age refinement and to detect subtle changes in paleoenvironment and paleoclimate during the Paleocene-Early Eocene (ODP Hole 959D and Alo-1 Well) and Late Eocene-Early Miocene (ODP Hole 959A and W-17001). Palynofacies analysis and lithologic descriptions supplemented palynomorph data for paleoenvironmental reconstructions in ODP Hole 959A and W-17001. In ODP Hole 959D, five biozones were erected, a Late Paleocene hiatus event was identified, four new dinoflagellate cyst species were formally named, and an outer neritic paleoenvironment was inferred. The paleoenvironment was shallower (inner neritic) in the Alo-1 Well which yielded two new species and had four biozones. Five biozones were established for the Late Eocene-Early Miocene interval in ODP Hole 959A, proposed the Late Eocene as a new age assignment for lithologic subunit IIB, noted a hiatus event upsection, and observed new biostratigraphic ranges for two dinoflagellate cyst species. A deep paleoenvironment with relatively cold-water masses during the Early Oligocene and hyperstratified conditions was proposed. Two hiatus events and fluctuations between restricted marine and open marine paleoenvironments were inferred in the W-17001.
机译：在热带-亚热带地区，从温室条件（古新世-始新世热最大值，PETM）到冰室条件（早渐新世）的转变尚无充分文献记载。在尼日尔三角洲北部（Anambra）盆地的Alo-1井，科特迪瓦-加纳变换边界的959号海洋钻探计划（ODP）959号站点（959A孔和959D孔）中抽取了一百五个样本研究了佛罗里达州东南部的-17001的孢粉含量。鞭毛藻囊肿主要用于细化年龄，并检测古新世-早始新世（ODP孔959D和Alo-1井）和晚始新世-早中新世（ODP孔959A和W-17001）的古环境和古气候的细微变化。孢粉相分析和岩性描述补充了粉状岩数据，用于ODP 959A和W-17001孔中的古环境重建。在ODP 959D洞中，竖立了五个生物区，发现了晚新世裂谷事件，正式命名了四个新的鞭毛藻囊肿物种，并推断出外部的松露古环境。 Alo-1井的古环境较浅（内部为酸性），产生了两个新物种并具有四个生物区。在ODP孔959A中为晚始新世-早中新世间隔建立了5个生物区，提出将晚始新世作为岩性IIB单元的新年龄分配，注意到了裂隙事件上移，并观察到了两种双鞭毛囊肿物种的新生物地层范围。提出了在渐新世早期和超层状条件下具有较冷水团的深古环境。在W-17001中，推断出两个中断事件以及受限制的海洋环境和开放海洋古环境之间的波动。

著录项

  • 作者

    Awad, Walaa Kamaleldeen.;

  • 作者单位

    Missouri University of Science and Technology.;

  • 授予单位 Missouri University of Science and Technology.;
  • 学科 Paleontology.;Sedimentary geology.;Geology.
  • 学位 Ph.D.
  • 年度 2018
  • 页码 288 p.
  • 总页数 288
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号