Authors' Note: Glacial can be pronounced with either 2 or 3 syllables. Here, the word has the meaning of 'produced by, or related to a glacier’.
Geologists tell us that during the Wisconsin glaciation, the ice-sheet scooped out soft rock and pushed the piled-up debris, sand and gravel, southward towards Lake Iroquois, the precursor of Lake Ontario. Twelve thousand years ago, with the ending of the ice-age, meltwater from the Laurentide Glacier eroded the channels that became the basis of Toronto's system of ravines.
If you are interested in winding your way through an encyclopedic collection of four blogposts stuffed with photo-collages on Toronto ravines, click HERE.
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