Mining in the Waltersburg Quadrangle
The coal mined in the Waltersburg Quadrangle was deposited in lenticular pods, unlike the large sheet-like deposits that make up the Herrin and Springfield reserves. The coal ranged up to 3 feet thick, and was often shallow enough to mine from the surface. Most of the mines operated only a few years, and none mined more than a few acres. Fluorspar mining took place in this area as well as clay mining. The clay was similar to kaolin and could be used for ceramic purposes, such as pottery and stoneware. The clay was mined between 1866 and 1906, and reserves of the clay remain.