Nannofossil abundance of Hole 66-493B
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https://b2find.eudat.eu/dataset/d3c66c10-e0e3-5a66-8b28-63aed10fd4af
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Relative abundance: D = dominant, A = abundant, C = common, F = few, R = rare, T = trace, P = present (numerical values are abundance in percent)
相对丰度分级标准如下:D为优势(dominant),A为丰富(abundant),C为常见(common),F为稀少(few),R为稀有(rare),T为微量(trace),P为存在(present);数值形式的丰度以百分比为单位。



