(Table 5) Distribution of calcareous nannofossils at Well QA-BG 54, Maryland ...
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Abundance is characterized by VA= very abundant; C= common; F= few; R= rare; B= barren, EB= essentially barren. For preservation. P= poor; M= moderate; G= good, E= etched; O=...
本数据集的丰度与保存状态分级标准如下:丰度分级包括:极多(Very Abundant,VA)、常见(Common,C)、少见(Few,F)、稀少(Rare,R)、无生物(Barren,B)、近乎无生物(Essentially Barren,EB);保存状态分级包括:差(Poor,P)、中等(Moderate,M)、良好(Good,G)、溶蚀(Etched,E)、O=……



