biostratigraphic classification
... biostratification 生物地层层理 biostratigraphic classification 生物地层学划分 biostratigraphic correlation 生物地层学对比 ...
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采取点、线、面相结合， 岩石地层学、 生物地层学和同位素年代学相结合的工作方法，研究了这套地层的层序、划分和对比问题；
The succession, division and correlation of these strata are studied with lithostratigraphy, biostratigraphy and isotopic geochronology methods and by the combination of of point, line and area.
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