Comment on "Yin, J. (2022), A revision and new data on the Jurassic ammonites from the Biluoco area, southern Qiangtang block (North Tibet)"

Yin (Newsletters on Stratigraphy, 2022, 55, 1-19) has suggested that there is no evidence of the Toarcian Oceanic Anoxic Event (T-OAE) in terms of organic-rich shales in the Qiangtang region, northern Tibet based on a revision data on the Jurassic ammonites from the Biluoco area. However, He used some unbelievable ammonites to determine the depositional age of the Biluoco section, and failed to constrain the age of T-OAE interval. Our data suggest that the T-OAE was extensive in the Qiangtang Basin supporting a global event. We also revised wrong information of strata in the Biluoco area in Yin (Newsletters on Stratigraphy, 2022, 55, 1-19).