DescriptionCannonFalls, Minnesota 5.jpg English: Street in downtownCannonFalls, Minnesota, USA. Date 14 May 2010 Source Own work Author AlexiusHoratius
Shakopee Formation (Lower Ordovician) exposed in Hernke's Rock Quarry near CannonFalls, SE Minnesota. Platteville Limestone (Upper Ordovician) exposed in Decorah