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Naming Stratigraphic Section of Lianggaoshan Sandstone

September 24,2024

It is located in Lianggaoshan Hill, Da’an District, Zigong. Lianggaoshan Sandstone was firstly named by geologists Tan Xichou and Li Chunyu in 1933 based on a suite of sandstones exposed here as an uppermost lithologic stratum of Ziliujing Bed initially. Later it was evidenced that it is actually a suite of sandstone at the bottom of the Middle Jurassic Xiashaximiao Formation. The so-called Lianggaoshan Sandstone here is composed of yellowish grey lithic quartzarenite and quartzarenite with developed cross or wave beddings, indicating a channel deposit in a high-energy environment.

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