The limestone bedrock of Inverhuron Provincial Park outcrops along the shore of the Little Sauble River. This bedrock was covered by an ancient coastal dune system which developed on top of a sand bar in post-glacial Lake Nipissing. As the Nipissing waters receded some 4000 years ago, new bars were formed and a series of more recent coastal dune systems developed. Today the oldest dunes are the furthest inland and the shore features a large sandy beach which is popular with swimmers and sunbathers. The former beaches and the coastal dunes associated with them are very important in the archaeological history of the area. As well as being ecologically important
