(Table 4) Abundance, preservation, and distribution of calcareous nannofossil...
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Species abundance: V = very abundant (>10 specimens per field of view), A = abundant (1-10 specimens per field of view), C = common (1 specimen in 2-10 fields of view), F =...
物种丰度(Species abundance)分级标准如下:V 代表极丰富(单视野内标本数>10个),A 代表丰富(单视野内标本数为1~10个),C 代表常见(每2~10个视野可见1个标本),F 为……



