Early Ordovician carbonates of the Shakopee Formation of the Prairie du Chien Group exposed in the valleys of the Cannon River and Lyman Creek in Northfield, MN.
![](https://sedimentaryglg.nau.edu/wp-content/uploads/2020/03/cannon_river_stroms_1-1024x913.jpg)
![](https://sedimentaryglg.nau.edu/wp-content/uploads/2020/03/cannon_river_stroms_1_geometry-1024x811.jpg)
Early Ordovician carbonates of the Shakopee Formation of the Prairie du Chien Group exposed in the valleys of the Cannon River and Lyman Creek in Northfield, MN.