The Mound Shapes
Many mounds groups, such as the Nitschke Mounds, contain a variety of shapes with varying sizes, two exceeding 200 feet in length are found in the Nitschke group. It is believed that most effigy mounds fall into three classes corresponding to the three natural realms - air, earth and water.
The cosmology of many Midwest Native American tribes consider these realms in terms of the upper world (air) and lower world (earth and water). Some of the prominent shapes in this particular grouping include turtles, panthers, canines, buffalo (bear), deer and birds. Long-tailed effigies, such as turtle and panther mounds are believed to be representations of powerful (lower world) water spirit-beings.
Often times they are oriented toward a spring or water source. Turtle mound #1 appears oriented toward the springs southeast of the park on the south side of HWY E. Canines, buffalo (bear), deer and other legged animal effigies are associated with the (lower world) earth. Spirit beings and birds are classified in the upper world (air).
The water spirit effigies tend to be more common in this part of the state, however, mound groups usually contain effigies from all spirited realms signifying an attempt to be in balance and harmony with the natural world.