(Table 3d) Oligocene to Eocene calcareous nannofossils in ODP Site 122-762
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species abundance: A = abundant (>10 specimens per field of view at 1000 X), C = common (1-10 specimens), F = few (1 specimen in 2-10 fields), R = rare (1 specimen in 11-100...
物种丰度（species abundance）分级标准如下：A为丰富级，指1000倍（×1000）放大视野下，单视野内标本数量大于10；C为常见级，单视野内标本数量为1~10；F为少见级，指每2~10个视野中仅出现1个标本；R为稀有级，指每11~100个视野中仅出现1个标本……
