(Table 2) Distribution of late Eocene calcareous nannofossils in ODP Hole 149...
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Species abundance: V = very abundant (> 10 specimens per field of view, A = abundant (1 to 10 specimens per field), C = common (1 specimen per 2 to 10 fields), F = few (1...
物种丰度（Species abundance）分级规则如下：V = 极丰富（每视野标本数>10个），A = 丰富（每视野1~10个标本），C = 常见（每2~10个视野对应1个标本），F = 稀少（1……）
