The Huronian Supergroup is a Proterozoic assemblage of geologic formations of the Superior craton of the Canadian Shield in Ontario and Quebec. It extends from west of the city of Sault Ste. Marie in the west to the Ontario-Quebec border to the east and is part of the Southern Geologic Province. Stratigraphy The Huronian Supergroup consists of four Groups. All the rocks are low grade metamorphic sedimentary rocks or igneous rocks. Age