(Table 3) Paleogene calcareous nannofossil stratigraphy of ODP Hole 120-748B
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Species abundance: A = abundant (>50%), C = common (10-50%), F = few (<10%), R = rare (one to few specimens), - = absent
物种丰度(Species abundance)的分级规则如下:A代表丰富(abundant,相对丰度>50%),C代表常见(common,相对丰度10%~50%),F代表稀少(few,相对丰度<10%),R代表罕见(rare,仅含1至数个标本),符号“-”表示缺失(absent)



