McGrath Meltwater Channel

A Bonnechere Valley Township 42.6-ha regionally significant Earth Science ANSI.

McGrath Meltwater Channel ANSI contains a Late Wisconsinan meltwater channel, drumlinized till and a boulder lag deposit. The ANSI is located in a flat bottomed valley which was cut in drumlinized till by meltwaters issuing from a nearby ice front. Lag boulders occur in an abandoned channel. [Earth Science Database, 1998]