(Table 6) Range chart of relative abundances of late Oligocene nannofossils i...
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species abundance: A = abundant, C = common, F = few, R = rare, - = absent, nannofossil zone after Okada and Bukry (1980) CP19a-CP19b
物种丰度分级标准如下:A代表丰富(abundant),C代表常见(common),F代表稀少(few),R代表罕见(rare),"-"代表缺失;本数据集采用Okada与Bukry(1980)提出的超微化石(nannofossil)带划分方案,对应区间为CP19a-CP19b。



