(Table 3) Distribution of calcareous nannofossil species at DSDP Holes 25-239...
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Abundance - V = very abundant, (more than 10 specimens/field of view); A = abundant, (1 to 10 specimens/field of view); C = common, (1 specimen/2-10 fields of view); F = few, (1...
丰度（Abundance）分级规则如下：V = 极丰富，（视野内标本量超过10件）；A = 丰富，（视野内标本量为1至10件）；C = 常见，（每2至10个视野内可见1件标本）；F = 稀少，（1……
