(Table 2) Stratigraphic ranges of selected Oligocene planktonic foraminifers in ODP Hole 115-706A@en

VA = very abundant, A = abundant, C = common, F = few, VF = very few, R -= rare, VR = very rare, X = present. 1 = very abundant, very good preservation; 2 = medium abundant, good preservation; 3 = medium scarce, medium preservation; 4 = scarce, poor preservation; 5 = very scarce, very poor preservation. - = not observed.

VA（very abundant，极丰富）、A（abundant，丰富）、C（common，常见）、F（few，少量）、VF（very few，极少量）、R-（rare，罕见）、VR（very rare，极罕见）、X（present，存在）。1 = 极丰富，保存状态极佳；2 = 中等丰度，保存状态良好；3 = 丰度中等偏低，保存状态一般；4 = 稀少，保存状态较差；5 = 极稀少，保存状态极差。- = 未观测到。