(Table 4d) Lower Eocene calcareous nannofossils in ODP Hole 122-762C@en
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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 fields), V = very rare (1 specimen in 101-1000 fields), - = absent
物种丰度（species abundance）判定标准如下：A代表丰富型（1000倍物镜视野下每视野标本量＞10）；C代表常见型（每视野含1~10个标本）；F代表稀少型（2~10个视野中仅见1个标本）；R代表罕见型（11~100个视野中仅见1个标本）；V代表极罕见型（101~1000个视野中仅见1个标本）；“-”代表不存在（absent）
创建时间：
2026-04-18
