摘要
Based on observation in the field, this paper documents the sedimentary features and variations of Jiufotang Formation in the Luanping Basin. A special kind of rock, namely, peperite, was identified and described in detail. Taking the geological setting of the basin into account as an example, the author believes that the Luanping Basin is a volcanic sedimentary basin. The intensive synsedimentary tectonic activity has resulted in the peperite in the Jiufotang Formation.