(Table 2g) Nannofossil distribution chart of petroleum well Swan-3
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A = abundant (>100 specimens per field of view (FOV)); C = common (11-100 specimens per FOV); F = few (1-10 specimens per FOV); R = rare (1 specimen in 10 FOVs); S = single...
A = 丰富（每个视场（field of view, FOV）内标本数量大于100个）；C = 常见（每个视场内标本数量为11至100个）；F = 少量（每个视场内标本数量为1至10个）；R = 稀有（每10个视场内仅出现1个标本）；S = 单个……
