And the crust continued to be extensional during the Late Cretaceous and Tertiary period resulting from the volcanic sedimentaryassociation with the rift type characteristics.
晚白垩世—第三纪地壳继续处于拉张松弛环境，形成以裂谷环境为主要特征的火山—沉积岩石组合。
2
According to rock association and sedimentary formation, strata in Ertan Hydropower Station dam area may be divided into 3 Members.
二滩水电站库区的地层岩性，按其组合和沉积建造分为三段。
3
Facies association, lithologic composition, deposition sequence, sectional structure, sedimentary structure and grain size probability are analysed in detail.