(Table 1) Calcareous nannofossil distribution in the Upper Cretaceous of ODP Site 120-747
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Species abundance: A = abundant (1-10 specimens per field of view at X1500), C = common (1 specimen per 2-10 fields), F = few (1 specimen per 11-100 fields), R = rare (1 specimen per 101-1000 fields), ? = questionable presence, - = absent.
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Watkins, David K创建时间：
1992-01-01
