We're the third rock from the sun, and rocks play a vital role in determining our native plants, natural communities, ecoregions, and watersheds. And it's been going on for a long, long time.
Deep time: Wisconsin geology's greatest hits.
Formation of the Canadian shield
A failed rift
Eons (?) of erosion
Cold time: Pleistocene glaciation in Wisconsin.
Ice ages in ages past and right now
The effects of glaciation (and glacial movement)
The face of Wisconsin: Some geological features of our state.
Moraines, kettles, ....
Look out below: Rock and soil
How rocks affect soil