Gypsum Caves: Gypsum Caves, also called gypsum karst caves, variety through the dissolution of gypsum by groundwater. As marginally acidic drinking water percolates by way of gypsum-wealthy bedrock, it progressively dissolves the gypsum, building underground voids and passages. Gypsum can take up to a few months to interrupt up clay https://www.propanraya.com/id/produk/eco-gypsum-ee-4050