Research indicates Mississippi River is older than thought

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CARBONDALE, Ill. (AP) - Research by a Southern Illinois University instructor and her graduate student indicates the Mississippi River is more than three times older than previous records suggested. Sally Potter-McIntyre, an associate professor in SIU's School of Earth Systems and Sustainability, said in 2013 her then-graduate student, Jeremy Breeden, wanted to date deposits of sedimentary rock in his native Southern Illinois. So, she led a team of researchers, including Breeden, to begin dating sedimentary rock found at Illinois' southernmost tip. To do this, Potter-McIntyre said the researchers separated particles, called zircons, from bags of sedimentary rock collected by her team. These particles are found as grains of sand. After separating...

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Research indicates Mississippi River is older than thought

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