Geology
Approximately 10,000 years ago, the river was a main outlet for glacial meltwater in this region. It is believed to have carried for a short time the outflow from the Lake Agassiz. The 100-metre (328 ft) deep Barron Canyon was formed during that time. The rocks exposed in the Canyon are part of the Canadian Shield. The canyon itself still shows activity in the form of rockfalls and landslides.
The Barron River lies inside a fault associated with the Ottawa-Bonnechere Graben.
Read more about this topic: Barron River (Ontario)