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The Mississippi River System, also referred to as the Western Rivers, is a mostly riverine network of the United States which includes the Mississippi River and connecting waterways. The Mississippi River is the largest drainage basin in the United States. [ 3] In the United States, the Mississippi drains about 41% of the country's rivers. [ 4]
The Mississippi River[ b ] is the primary river and second-longest river of the largest drainage basin in the United States. [ c ][ 15 ][ 16 ] From its traditional source of Lake Itasca in northern Minnesota, it flows generally south for 2,340 miles (3,766 km) [ 16 ] to the Mississippi River Delta in the Gulf of Mexico.
The Mississippi River Delta is the 7th largest river delta on Earth and is an important coastal region for the United States, containing more than 2.7 million acres (4,200 sq mi; 11,000 km 2) of coastal wetlands and 37% of the estuarine marsh in the conterminous U.S. [1] The coastal area is the nation's largest drainage basin and drains about ...
Madeline Heim is a Report for America corps reporter who writes about environmental issues in the Mississippi River watershed and across Wisconsin. Contact her at (920) 996-7266 or mheim@gannett.com .
A map of the McClellan–Kerr Arkansas River Navigation System. The McClellan–Kerr Arkansas River Navigation System ( MKARNS) is part of the United States inland waterway system originating at the Tulsa Port of Catoosa and running southeast through Oklahoma and Arkansas to the Mississippi River. The total length of the system is 445 miles ...
The geology of Mississippi includes some deep igneous and metamorphic crystalline basement rocks from the Precambrian known only from boreholes in the north, as well as sedimentary sequences from the Paleozoic. The region long experienced shallow marine conditions during the tectonic evolutions of the Mesozoic and Cenozoic, as coastal plain ...
Steamboats played a major role in the 19th-century development of the Mississippi River and its tributaries, allowing practical large-scale transport of passengers and freight both up- and down-river. Using steam power, riverboats were developed during that time which could navigate in shallow waters as well as upriver against strong currents.
In terms of geologic and hydrographic history, the Upper Mississippi east and south of Fort Snelling is a portion of the now-extinct Glacial River Warren which carved the valley of the Minnesota River, permitting the immense Glacial Lake Agassiz to join the world's oceans at the Gulf of Mexico. The collapse of ice dams holding back Glacial Lake ...