Huronian - English meaning

adjective

Designating a series of (chiefly sedimentary) rocks occurring in south-eastern canada and the processes and periods in which they were formed; of or relating to these rocks or their formation. in later use chiefly with reference to a series of glaciations during which some of these rocks were laid down, or the era of the proterozoic (2400 to 2100 million years ago approx.) when this occurred.

noun

With the. the huronian series of rocks; the huronian era.