St. Peter sandstone near Cannon Falls, MN

St. Peter sandstone near Cannon Falls, MN

the soft, loosely consolidated sandstone located along Goodhue county road 25 is makes for easy nesting grounds for some birds. The St. Peter sandstone and capping Platteville limestone are overlain by the very fossiliferous Decorah shale (although not at this location). The Decorah outcrops further to the east CR 25.

Courtesy Mark Ryan.
Mark Ryan retains full Copyright on this image.