(Table 3) Distribution of calcareous nannofossils in ODP Hole 124-770B
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species abundance: W = very abundant (>70 % of a rich assemblage), A = abundant (>10 specimens per field of view at 1500 X), C = common (1-10 specimens per field), F = few...
物种丰度(species abundance)分级标准如下:W表示极丰富(占丰富物种组合的比例>70%),A表示丰富(1500倍放大视野下,每视野标本量>10),C表示常见(每视野标本量为1~10),F表示稀少……



