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document updated 20 years ago, on Sep 20, 2005
add external link:
http://cires.colorado.edu/science/pro/wdn/Coleman%20Report/LandlossSummary.pdf
delta switching details during the Holocene period
Science: A Revised Chronology for Mississippi River Subdeltas
The Lake Pontchartrain Basin began forming about 5,000 years ago when the North American glacier melts caused the Mississippi River to swell and shift to the east...
before the Mississippi was flowing strong, it was frozen in glaciers