(Table T1) Benthic foraminfera stratigraphy of ODP Hole 199-1218A and 199-1219A sediments

<p>We investigated benthic foraminiferal assemblages from Sites 1218 and 1219, Ocean Drilling Program Leg 199, to understand the abyssal response of the eastern equatorial Pacific to the Oligocene climate. Globocassidulina subglobosa, Oridorsalis umbonatus, Gyroidinoides spp., Cibicidoides spp., and Pullenia spp. are common in the lower Oligocene, whereas Nuttallides umbonifer, a dominant species in carbonate corrosive deep water, often dominates the upper Oligocene assemblage at both sites.</p>

本研究调查了来自海洋钻探计划第199航次1218和1219站点的底栖有孔虫组合，旨在揭示东赤道太平洋对奥利地期气候变化的深渊响应。在较低的奥利地期，球形球房虫属（Globocassidulina subglobosa）、隆脊翼形虫属（Oridorsalis umbonatus）、多面体虫属（Gyroidinoides spp.）、双壳虫属（Cibicidoides spp.）和普罗勒虫属（Pullenia spp.）普遍存在；而在碳酸腐蚀性深水中占主导地位的纽塔利翼形虫属（Nuttallides umbonifer），常在两个站点的较高奥利地期组合中占据主导地位。