Distribution of calcareous nannofossils from IODP Hole 313-M0027A

Sediment depth is given in mbsf.
Abundance: V = very abundant, A = abundant, C = common, Fr = frequent, F = few, R = rare, B = barren, ? = questionable, * = reworked. Preservation: G = good, M = moderate, P = poor. FO = first occurrence, LO = last occurrence.

沉积深度以米/百英尺（mbsf）为单位给出。丰富度：V = 非常丰富，A = 丰富，C = 常见，Fr = 频繁，F = 少数，R = 稀有，B = 贫瘠，? = 可疑，* = 重新加工。保存状态：G = 良好，M = 中等，P = 差。FO = 首次出现，LO = 最后出现。