Ball Mill Resurgence is a small tract of upland forest that contains multiple sinkholes and a large resurgence. This forest area contains a sinkhole resurgence at the base of a 50-foot limestone bluff. Rocks fall into the basin and are tumbled smooth by water that resurfaces up into the resurgence after heavy rains. The forest is a mature mixed oak-hickory forest that has a good diversity of plants.The karst features of this natural area are part of the larger karst network found in Perry County – the county in Missouri with the highest density of caves. The underground drainage system and calcareous bedrock of Perry County is akin to a block of Swiss cheese with water moving in very complex drainage patterns.
http://mdc4.mdc.mo.gov/applications/moatlas/AreaSummaryPage.aspx?txtAreaID=7918#FacilityResults
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