Geography
The Upper Peninsula contains 16,452 square miles (42,610 km²), almost one-third of the land area of the state (exclusive of territorial waters, which constitute about 40% of Michigan's total jurisdictional area). The maximum east-west distance in the Upper Peninsula is about 320 miles (515 km), and the maximum north-south distance is about 125 miles (200 km). It is bounded on the north by Lake Superior, on the east by St. Mary's River, on the south by Lake Michigan and Lake Huron, and on the west by Wisconsin and (counting the water border on Lake Superior) by Minnesota. It has about 1,700 miles (2,700 km) of continuous shoreline with the Great Lakes. There are about 4,300 inland lakes, the largest of which is Lake Gogebic, and 12,000 miles (19,000 km) of streams.
The peninsula is divided between the flat, swampy areas in the east, part of the Great Lakes Plain, and the steeper, more rugged western half, called the Superior Upland, part of the Canadian Shield. The rock in the western portion is the result of volcanic eruptions and is estimated to be at least 3.5 billion years old (much older than the eastern portion) and contains the region's ore resources. Banded-iron formations were deposited 2,000 million years ago; this is the Marquette Range Supergroup. A considerable amount of bedrock is visible. Mount Arvon, the highest point in Michigan, is found in the region, as well as the Porcupine and Huron Mountains. All of the higher areas are the remnants of ancient peaks, worn down over millions of years by erosion and glaciers.
The Keweenaw Peninsula is the northernmost part of the peninsula. It projects into Lake Superior and was the site of the first copper boom in the United States, part of a larger region of the peninsula called the Copper Country. Copper Island is its northernmost section.
About one third of the peninsula is government owned recreational forest land today, including the Ottawa National Forest and Hiawatha National Forest. Although heavily logged in the 19th century, the majority of the land was forested with mature trees by the 1970s.
Further information: Protected areas of MichiganRead more about this topic: Upper Peninsula Of Michigan
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