The Huronian Supergroup is a Proterozoic assemblage of geologic groups of the Superior Craton of the Canadian Shield in Ontario and Quebec.
Marie in the west to the Ontario-Quebec border to the east and is part of the Southern Geologic Province.
[3] The bulk of the Huronian Group consists of mostly metamorphosed sandstones and mudstones.
However, the base contains volcanic rocks that have been dated at about 2.480 billion years ago (Gya).
The top of the Huronian and cross cutting all of the units within are the Nipissing sills which date to 2.2185 Gya.