SSC MTS EXAM

Detailed explanation-1: -The Canadian Shield is the ancient core of the North American Continent. It is composed mainly of highly metamorphosed granite, with smaller areas of metamorphosed sedimentary and igneous rocks and some areas of relatively horizontal but still quite ancient sedimentary rocks.

Detailed explanation-2: -One of the best known is the Canadian Shield, which extends from Lake Superior on the south to the Arctic Islands on the north, and from western Canada eastward, to include most of Greenland.

Detailed explanation-3: -Migmatitic gneisses are common in rocks of the Canadian Shield, which have experienced many episodes of metamorphism at very high pressures and temperatures. Polymetamorphic rocks have been subjected to several episodes of metamorphism. Such rocks generally reveal their complex histories through their textures.

Detailed explanation-4: -Landforms in the Canadian Shield include both flat areas and rocky hills. There are forests, tundra, and lowlands. More than one quarter of the Canadian Shield’s surface is covered by water. The Canadian Shield has thousands of lakes, rivers, streams, and marshes.