Radiolarian faunal turnover across the Oligocene/Miocene boundary in the equatorial Pacific Ocean

The global warming trend of the latest Oligocene was interrupted by several cooling events associated with Antarctic glaciations. These cooling events affected surface water productivity and plankton assemblages. Well-preserved radiolarians were obtained from upper Oligocene to lower Miocene sediments at Ocean Drilling Program (ODP) Leg 199 Sites 1218 and 1219 in the equatorial Pacific, and 110 radiolarian species were identified. […]

最新奥利根阶全球变暖趋势被多次与南极冰川作用相关的降温事件所打断。这些降温事件影响了地表水生产力及浮游生物群落。在太平洋赤道地区的海洋钻探计划（ODP）第199航次1218和1219站位上，从上奥利根阶至下中新统沉积物中获取了保存完好的放射虫，共鉴定出110种放射虫物种。