Our grandchildren, Camryn and Caden, from Missouri spent a week with us. One of the places we visited was Rock City, which is located south west of Minneapolis, KS.
The rocks are remarkable because of their great size and large number. The spheriod masses are know as concretions. Rock City has 200 sandstone concretions covering the area of approximately two football fields. There are others throughout the world, but none are as large as they are at Rock City.