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The 'Canadian Shield and the Innuitian region are located to the south of the Arctic Lowland plains. This is a region of tundra, a treeless plain, with a cold, dry climate and poorly drained soil. The Arctic Lowlands region is located in Nunavut and the Northwest Territories. The Arctic Lowlands are plains located in Canada. Plains are extensive areas of level or gently rolling land. In North America there is a large, flat interior plain. They are also part of an area that is commonly referred to as the Arctic Archipelago, which occupies much of the central Canadian Arctic. They are made up of a series of islands located in Canada's far north, and remain frozen for most of the year. However, the Paleozoic sedimentary rock, from which the Lowlands are formed, contains lignite (a form of coal), oil, and natural gas deposits. Limestone is very abundant as well. The Arctic Lowlands have a small human population. The terrain is mostly ice, snow, rock, and it is full of marshes, especially in the winter. Animals that live in the area include polar bears, char, Arctic hares and Arctic foxes. This region is being affected by global warming. It is very cold and human life may be difficult. Commonly known as the Hudson Bay-Arctic Lowlands, the Hudson Bay contains over 80% water. It started to form in the Cenozoic era.