Document Summary

Denudation: gradually wears down mountains by erosion & weathering: ex: appalachians worn down due to weathering breaking down solid rocks into smaller particles, erosion transporting these particles by air, ice & water. Continental drift: plant tectonics when these plates drift, they collide w/ one another, creating mountains at times. Canadian shield: the precambrian crystalline rock contains deposits of copper, diamonds, gold, nickel, iron & uranium. Interior plains: have a sedimentary structure that contains oil & gas deposits. Page 34 ** know map: the canadian shield largest in canada. Glacial erosion: caused by giant ice sheets slowly grinding over the earth s surface, scraping its rock surface. When the ice melted, the debris (till) was carried to other locations & forming temporary lakes until it reached the sea. Drumlins: long, low hills composed of till. Eskers: long, narrow mounds of sand & gravel deposited by meltwater steams found under a glacier.

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