Sweet Gale, Lower Oxtongue River Marsh (spring 2019)
The Oxtongue River is a watercourse of 42 kilometres that flows from Algonquin Park to the Lake of Bays in northern Ontario. The River is a remnant of a spillway that once carried melting water from a three-kilometer high glacier into the glacial Lake Algonquin. As the river meandered through the sandy outwash left behind as Lake Algonquin dropped in level, kettle depressions, oxbows, and shallow plains of soft sediment and sand were formed. These natural features created an ideal, self-contained estuarine delta supporting valuable recreational wetlands in a region experiencing heavy pressure for cottage development.