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Environmental Impacts Of The Mississippi Valley

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Environmental impacts have been humanity 's constant for over trillions of decades.That is how we stay alive and alert.We are constantly innovating and adjusting to our surroundings.Even during the late centuries early civilizations have been adapting to their beautiful and majestic lives. For a prime example, the ancient mounds of the Cahokia clan and the largest earthworks in the Western.In the Mississippi River floodplain, where the water table was always high and where the could thrive,the Mississippi valley had been the first and only one to be so carefully engineered. Over the next century or two the Cahokia clan made the bedside of the Mississippi more than a pile of dirt, the city surrounding it was more than an agglomeration of …show more content…

The culture of which the city was the fountainhead, and which overspread the southeastern U.S., we call Mississippian. That portion of the city now owned by the state of Illinois to protect it from real estate developers. It was called the Cahokia Mounds State Historic Site.The city 's thatched wooden houses had hard-packed clay around them; even the mounds may have been covered with clay rather than prairie grasses.
They sift every spoonful of earth, and they map in 3-D where each scrap of bone, corn, pottery, and shell bead comes from. They even keep track of where the dirt changes color.Cahokia Mounds State ,where a mystery was partly solved when workers at another dig a few miles away found a bald cypress log three feet in diameter in such a hole. The "bathtubs" were post pits, shaped to make it possible to ease huge posts into them. It soon became clear that the prehistoric "Cahokians" had indeed designed and put in place a circle of posts. And not just any circle: if you stood at its center on the mornings of the spring and fall equinoxes (usually March 21 and September 21 in our calendar), you would see the sun rise from behind a post. It 's lucky for us that Mississippian culture survived Cahokia 's decline and abandonment around 1300 and was still around in 1539, when Hernando de Soto tried to conquer what is now the

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