栎粉属-柳粉属-粉属组合，属晚始新世-早渐新世。
Quercoidites - Saliaxipollenites- Fraxinoipollenits assemblage, which may belong to Late Eocene-Early Oligocene.
会聚构造型式以对冲式及叠覆式为主要类型， 形成时期在晚始新世—渐新世。
The main patterns of the convergent structure are the ramp type and the superimposed one. And their forming periods are Late Eocene Oligoecne.
这两个“印支地槽”的主要褶皱时代是中、晚始新世之交，以勐腊群及其相当层位之下的区域性巨大不整合为标志。
The principal fold age of the two "Indosinian geosynclines" is between the Middle and Late Eocene, which is marked by the regional flagrant unconformity below the Mengla Group and equivalent horizons.
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