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Naming Stratigraphic Section of Dafenbao Clay

September 24,2024

It is located in Dafenbao, Da’an District, Zigong. Dafenbao Clay was named by geologists Tan Xichou and Li Chunyu in 1933 based on a suite of mudstones exposed here as a lithologic stratum of Ziliujing Bed. Later it was put into Ma’anshan Member, the middle member of the Lower Jurassic Ziliujing Formation. Dafenbao Clay, 35 m thick, is composed of purple mudstone intercalated with greyish green muddy siltstone with wavy beddings. It was deposited in a lower-energy shallow lacustrine environment.


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