{"id":9799,"date":"2023-11-03T18:25:11","date_gmt":"2023-11-03T17:25:11","guid":{"rendered":"https:\/\/www.aboutriver.com\/?p=9799"},"modified":"2023-11-03T18:25:11","modified_gmt":"2023-11-03T17:25:11","slug":"how-the-upper-mississippi-river-was-formed","status":"publish","type":"post","link":"https:\/\/www.aboutriver.com\/how-the-upper-mississippi-river-was-formed\/","title":{"rendered":"How The Upper Mississippi River Was Formed"},"content":{"rendered":"
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Tucked away in the northern parts of the United States lies the Upper Mississippi River. Spanning a vast area of 2,400 miles, it’s one of the world’s longest river systems and home to many various species of animals. So, how was the Upper Mississippi River formed? It’s actually quite a fascinating story.<\/p>\n

The river was first formed when glaciers retreated some 12,000 to 15,000 years ago. The melting of these glaciers created a channel, allowing water to flow freely through what was then a series of distinct lakes. Over time, these lakes filled with sediment, which in turn created a delta, where the river’s headwaters now exist. This process is believed to have happened around 8,200 years ago.<\/p>\n

Geologists believe the Upper Mississippi region was pushed further up and away from the Gulf of Mexico by a major period of uplifting that is still happening even today. This downward pressure, combined with the continuing rise of water levels as the glacier continued to melt, caused the Upper Mississippi region to move south. As a result, the Mississippi’s headwaters are now located in Minnesota, rather than the Gulf of Mexico.<\/p>\n

The Upper Mississippi has had a huge impact on the flora and fauna of the region. The quantity of sediment brought in by the river helps to provide the nutrients necessary for plants, insects and animals to flourish. Many species, such as the American bullfrog and the white-tailed deer, share the Upper Mississippi River Valley as their home.<\/p>\n