The Stone Forest developed mainly from Permian pure limestone (Maokou Formation ) and dolomitic limestone (Qixai Formation ). Karstification processes include subsoil erosion, subaerial erosion and biological erosion. All these solution actions left their imprints on the rocks. Beside macro-karst shapes, a wide variety of beautiful micro-solution forms occurred on the rock surfaces such as rillenkarren, solution grooves, solution holes, solution slots, etc. Due to lithologic differences, the solution grooves and rillenkarren developed on pure limestone are uniform and smooth, as if made by knives and axe, while those developed on dolomitic limestone are rough, varied and disordered. Various micro-solution forms decorate the stone pillars exquisite relief sculptures and enrich the beauty of the stone forest.