(Table T1) Biostratigraphy and distribution of Quaternary and Miocene calcareous nannofossils in ODP Site 188-1165@en

During Ocean Drilling Program (ODP) Leg 188, piston and rotary cores were recovered at three southern Indian Ocean sites on the continental margin in Prydz Bay, Antarctica, in order to obtain a detailed sedimentary record reflecting Cenozoic Antarctic glacial history and paleoenvironments. Coring at continental rise Site 1165 revealed a relatively continuous, ~1000-m, lower Miocene to upper Pliocene section overlain by a thin Quaternary cover. No nannofossils were noted at shelf Site 1166, where a discontinuous, ~343-m section of Quaternary- to Late Cretaceous-age predominantly glacial marine diamictons was recovered. At slope Site 1167, ~447 m of clayey silty sands was recovered, where nannofossils are rare and sporadic but indicate Pleistocene age for at least the upper ~227 m there. […]在大洋钻探计划（Ocean Drilling Program, ODP）第188航次期间，科研团队于南极普里兹湾大陆边缘的三个南印度洋站位采集了活塞岩心与回转岩心，旨在获取能够反映新生代南极冰川演化历史与古环境的高精度沉积记录。在大陆隆站位1165开展的取芯作业揭示了一套相对连续、厚度约1000米的地层，其时代为中新世早期至上新世晚期，之上覆盖有薄层第四系沉积物。陆架站位1166未发现钙质超微化石（nannofossils），该站位获取了一套不连续、厚度约343米的地层，时代跨度为第四纪至晚白垩世，以冰川海相混杂岩为主。在陆坡站位1167，科研人员采集到厚度约447米的黏土质粉砂质砂地层，该站位的钙质超微化石稀少且零星分布，但至少可证明其上覆约227米地层的时代为更新世。……