Determination of folding time for the Eastern Sichuan Jura-type fold belt is a key for understanding dynamic mechanism of the important Yangtze intraplate deformation belt. Detailed field work demonstrates that the Upper Triassic strata are in disconformable contact with the Middle Triassic strata, which indicates that there was no Indosinian folding in the fold belt. Disconformities between Upper Triassic and Lower Jurassic strata, Lower Jurassic and Middle Jurassic strata, Middle Jurassic and Upper Jurassic strata indicate that the folding took place after the Late Jurassic time. Synthetic analysis constrained the folding time of Eastern Sichuan-Northwestern Hunan and Hubei fold belt to the interval between the latest Late Jurassic and the earliest Early Cretaceous, rather than previously proposed Indosinian or Yanshanian folding times.
