Gypsum Caves: Gypsum Caves, also referred to as gypsum karst caves, form through the dissolution of gypsum by groundwater. As a little acidic drinking water percolates by gypsum-loaded bedrock, it progressively dissolves the gypsum, building underground voids and passages. Soil drinking water prospective monitoring: a gypsum block may be inserted https://www.propanraya.com/id/produk/eco-gypsum-ee-4050