Eocene-Oligocene diatoms in the western Indian Ocean

The occurrence of diatom species in the Eocene-Oligocene sections of Ocean Drilling Program (ODP) Leg 115 sites and Deep Sea Drilling Project (DSDP) Sites 219 and 236 in the low-latitude Indian Ocean are investigated. Diatoms are generally rare and poorly preserved in the Paleogene sequences we studied. The best-preserved assemblages are found close to ash layers in early Oligocene sediments. […]

本研究对低纬度印度洋海域大洋钻探计划（Ocean Drilling Program, ODP）第115航次各站位，以及深海钻探计划（Deep Sea Drilling Project, DSDP）219号、236号钻孔的始新世-渐新世地层剖面中的硅藻（diatom）物种产出情况开展了调查。在所研究的古近纪地层序列中，硅藻整体较为稀少且保存状态欠佳。其中保存最佳的硅藻组合发现于早渐新世沉积物的火山灰层附近。[…]