The land disappeared during the Late Canglangpu Age and Longwangmiao Age (Early Cambrian) and the framework of palaeogeography consisted of tidal flat, open carbonate platform, platform-margin slopes and basin in the south.

• 早寒蝉寒武世中－晚期岩相古地理格局由碳酸盐潮坪、开阔台地、台缘斜坡和台缘盆地组成，该地区主体进入碳酸盐台地演化阶段。