![]() ![]() ![]() The MCRS also provided mineral deposits that shaped the region’s settlement and growth. However, the rifting stopped for some reason and failed to form a new ocean. Called the Midcontinent Rift System (MCRS), this structure is a 1.1 billion–year–old, 1,864-mile (3,000 km) long, mostly buried scar along which the North American continent started to tear apart. A crucial aspect of doing this is recognizing that many of the rocks and landforms in the Lake Superior parks are pieces of a huge regional structure. ![]() These landscapes provide an enormous but underused opportunity for park interpreters and educators to explain some of the most important processes that shape our planet. SOME OF THE MIDWEST'S MOST SPECTACULAR SCENERY occurs near Lake Superior, in places like Pictured Rocks and Apostle Islands National Lakeshores, Isle Royale National Park, Interstate Park, and Porcupine Mountains Wilderness State Park. Key words:Apostle Islands National Lakeshore, Isle Royale National Park, Lake Superior parks, Midcontinent Rift System, mineral deposits, Mount Rushmore National Memorial, Pictured Rocks National Lakeshore, plate tectonics, regional history, Yosemite National Park The rift gave rise to Lake Superior, which is the basis of the area’s water-based history and economy, the copper and building stone deposits that shaped the region’s settlement and growth, and today’s tourist industry. Known as the Midcontinent Rift System (MCRS), this structure is a 1.1 billion–year–old, about 1,800-mile (3,000 km) long scar along which the North American continent started to tear apart, but for some reason failed to form a new ocean. ![]() Lake Superior itself, and the spectacular scenery around it in national, state, and provincial parks, result from a huge geologic structure. Abstract:Few areas give interpreters and educators the opportunity to illustrate geoheritage-the role of geology in shaping an area’s culture and growth-as well as the Lake Superior region. ![]()
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