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Naming Stratigraphic Section of Ma’anshan Clay

September 24,2024

It is located in Ma’anshan Hill, Da’an District, Zigong. Ma’anshan Clay was named by geologists Tan Xichou and Li Chunyu in 1933 based on a suite of mudstone exposed here as a lithologic stratum of Ziliujing Bed. Later it was put into Ma’anshan Member, a middle member of the Lower Jurassic Ziliujing Formation. Ma’anshan Clay, 90 m thick, is dominated by purple silty mudstone with greenish gray muddy siltstone. The ripples are common in the siltstone. It was formed in a very shallow lacustrine-shallow lacustrine environment.


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