A Virtual Tour Gander Academy's Newfoundland and Labrador Glossary of Geological Terms cirque a bowl shaped valley carved by a glacier crust the outer layer of the earth. The crust is one of three sections of the earth. The crust varies in thickness, usually being thicker over the continents and thinner over the ocean. The crust to the earth is about as thin as the shell is to an egg.
Glaciers still exist in Canada in the Rocky Mountains and in the high Arctic.
Evidence left by the glaciers tell us that they were once here. These deposits can range from a few centimetres to several hundred metres thick. Glacials deposits can be seen along many road cuts along the province's highways. Evidence of isostatic rebound is common along shorelines in glaciated regions around the world. It is the thickest of the three layers.