huronian
Adjective
Meaning
Of or pertaining to certain non-fossiliferous rocks on the borders of Lake Huron, which are supposed to correspond in time to the latter part of the Archaean age.
Source: Webster's dictionaryExamples
A number of glacial periods have been identified going as far back as the Huronian epoch, roughly 2200 Ma.
The Huronian glaciation was named due to evidence collected from Lake Huron region.