Gypsum Caves: Gypsum caves, often called gypsum karst caves, sort with the dissolution of gypsum by groundwater. As slightly acidic drinking water percolates by gypsum-prosperous bedrock, it steadily dissolves the gypsum, building underground voids and passages. Gypsum has been broadly utilized to salvage alkali soils and make improvements to soil https://www.propanraya.com/id/produk/eco-gypsum-ee-4050