GEG-1 Lecture 5: Physical Geography 5
Document Summary
Canada is made up of three distinct types of landforms: Striking mountain areas each have different geological histories and appearances. The bedrock under is formed mainly of sediments eroded from the shield. These sediments were laid down in the seas that existed at various times millions of years ago. As the rock particles collected, the weight of the upper layers compressed the lower layers into sedimentary rocks. The movement of the earth"s plates, and the resulting folding, faulting and volcanic activity have combined with the forces of erosion and glaciation to create a variety of landscapes that affect the way we live. Canada is basically a core of ancient rock surrounded by lowlands and then highlands on all three sides. More than half of canada is covered by the shield. Some of the world"s oldest rocks (3. 96 billion years old) are located in the shield.
