When the super-continent Rodinia was formed, the early continents South America and North America were pushed together and the Grenville mountain range rose up, 1.2 billion years ago.
By 600 million years ago, weathering and erosion had worn away the Grenville Mountains. The swirling patterns in the rocks here are the deep roots of the mountains and all that is left of this ancient mountain range. The strange folds tell of rocks under great pressure, temperatures of up to 1200 degrees centigrade, and depths of up to 25 kilometres, able to flow like toffee, as one continent mated with another.
It's a landscape that has inspired many artists, including Canada's Group of Seven and many contemporary artists such as Ed Bartram.
Southern Ontario once hosted a magnificent mountain range formed about a billion years ago when early South and North America collided during the Grenville Orogeny. Only the deep roots of the mountains survive today and are exposed widely across Southern Ontario, Québec and the US Northeast.