| http://www.w3.org/ns/prov#value | - As sea levels dropped, the Mississippi and other rivers extended their courses into the embayment, which gradually became filled with sediment. -- answers.com/topic/mississippi-embayment/ (Below) Contour lines show where a shallow Gulf of Mexico once covered the lower Mississippi Valley to Dexter, MO, and just above the junction of the Ohio and Mississippi Rivers at Cairo, IL. (See a great explana
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