(Table 2) Mineralogy of silicates in the noncalcareous fraction od the Cretac...
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Mineral abundances: XXX = abundant, XX = present, X = some, tr = trace, - = absent. In bed VI (10 to 15 cm), carbonate-apatite is a raher abundant phase; its abundance increases...
矿物丰度分级标准如下:XXX 代表丰度极高(abundant),XX 代表存在(present),X 代表少量分布(some),tr 代表痕量(trace),- 代表缺失(absent)。在第6层位(10至15厘米)中,碳酸盐磷灰石(carbonate-apatite)为较为富集的物相,其丰度呈升高趋势……



