Gypsum Caves: Gypsum caves, generally known as gypsum karst caves, form throughout the dissolution of gypsum by groundwater. As a little bit acidic water percolates through gypsum-wealthy bedrock, it steadily dissolves the gypsum, generating underground voids and passages. Map of gypsum deposits in northern Ohio, black squares show The placement https://www.propanraya.com/id/produk/eco-gypsum-ee-4050