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Isle Royale geologic map Cross-section of the Lake Superior basin showing the tilted strata of volcanic rock that form Isle Royale. The island is composed largely of ridges, running roughly southwest-to-northeast. The main ridge, Greenstone Ridge, is over 1,000 ft (300 m) in many places.
Lake Superior's deepest point [4] on the bathymetric map. [1] Lake Superior has a surface area of 31,700 square miles (82,103 km 2), [7] which is approximately the size of South Carolina or Austria. It has a maximum length of 350 statute miles (560 km; 300 nmi) and maximum breadth of 160 statute miles (257 km; 139 nmi). [8]
Isle Royale (/ ˈ r ɔɪ əl /, ROY-əl) [1] is an island of the Great Lakes located in the northwest of Lake Superior and part of the U.S. state of Michigan.The island and the 450 surrounding smaller islands and waters make up Isle Royale National Park.
Located in Lake Superior, Isle Royale is the second largest island in the Great Lakes system, after only Manitoulin Island in Lake Huron. At 206.7 square miles (535 km 2), the island of Isle Royale itself is the third largest island in the contiguous United States (after Long Island and Padre Island) and is the fourth largest lake island in the ...
The shipping channels pass on opposite sides of Neebish Island in the St Marys River. The waterway allows passage from the Atlantic Ocean to the inland port of Duluth on Lake Superior, a distance of 2,340 miles (3,770 km) and to Chicago, on Lake Michigan, at 2,250 miles (3,620 km). [3]
Map including the Huron Islands showing Huron National Wildlife Refuge and the lighthouse (AMS, 1957)The Huron Islands are a group of eight small, rocky islands in Lake Superior, located about three miles (4.8 km) off the mouth of the Huron River in northwestern Marquette County, Michigan, United States.
The Apostle Islands National Lakeshore is located in Bayfield, Wisconsin, on Lake Superior, the "largest, cleanest, and coldest of the Great Lakes." [3] The lakeshore comprises beaches, cliffs, water, and 21 islands. [4] Of its area, 42,308 acres is land and 27,232 acres is water, extending 1/4 mile from the 155 miles of shoreline. [5]
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