摘要:
本文重点讨论了成都盆地（平原）的形成条件及成因与成生时期,对“大邑砾岩”的时代归属、第四纪下限提出了新的认识,对新构造运动进行了探讨,并总结了四川盆地西部边缘晚白垩世以来地史发展演化历程。
Abstract:
On the basis of the structural setting of the Chengdu basin （plain）, base- ment configuration and structural features of the plain, stratigraphic position of the basement, absence of some geologic ages, relations of sediment sources, depositional environments, lithofacies changes and changes in depositional scope since the Late Cretaceous, this paper deals with the conditions, origin and age of formation of the Chengdu basin, puts forwards new recognition on the age of the "Dayi Conglomerate" and the lower boundary of the Quaternary, discusses neotectonic movements, and summarizes the history of geological evolution sincep the Late Cretaceous at the western margin of the Sichuan basin.
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