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The epicenters show a clear relationship to tectonic features of the state; four epicenters lie along the Great Lakes tectonic zone. [15] Depths are estimated at 5 to 20 km (3 to 12 mi). [ 15 ] The best-documented event occurred on July 9, 1975, near Morris, Minnesota , with a magnitude of 4.6, and a felt area of 82,000 km 2 (32,000 sq mi ...
The next tectonic event was the Great Lakes tectonic zone which began with compression caused by the collision of the Superior province and the Minnesota River Valley subprovince during the Algoman orogeny about 2,700 million years ago; [5] it continued as a pulling apart (extensional) rift from 2,450 to 2,100 million years ago, [6]: 145 ...
Location Sense of movement ... Great Lakes Tectonic Zone (GLTZ) 1400: Great Lakes, United States: Tectonic zone: Neoarchean: Great Sumatran Fault: 1650-1900: Sumatra ...
Due to its great depth, vertical underwater cliffs, clear water, and submerged mining features, the lake is popular with scuba divers. The highest point in the Driftless area is West Blue Mound, with an elevation of 1,719 feet (524 m). [51] [52] The feature is located in Blue Mound State Park, in Iowa County.
The model displayed remnants of submerged plates located under oceans and in the middle of continents, which—according to our current understanding of the plate tectonic cycle—are all too far ...
The Algoman orogeny added landmass along a border from South Dakota to the Lake Huron region; this boundary is the Great Lakes tectonic zone (GLTZ). [ 5 ] Northeast Minnesota has 2700-million-year-ago exposed rocks formed during volcanic activity that was in the form of seepage of lava from rifts in the sea floor. [ 6 ]
Earthquakes occur when the plates that make up the Earth's crust move around. These plates, called tectonic plates, can push against each other. Earthquakes are most common along fault lines ...
The Great Lakes, also called the Great Lakes of North America, are a series of large interconnected freshwater lakes spanning the Canada–United States border.The five lakes are Superior, Michigan, Huron, Erie, and Ontario (though hydrologically, Michigan and Huron are a single body of water; they are joined by the Straits of Mackinac).