Gulf of Mexico#
![Gulf of Mexico Gulf of Mexico](/attach/Geography/America/United_States/Pictures/Factbook_Pictures/930us/scaled-835x800-930us.jpg)
Image courtesy of USGS., under PD
Like the webbing on a ducks foot, marshes and mudflats in this 2001 satellite photo prevail between the shipping channels that have been cut into the delta.
The deltaic progression has advanced South Louisianas coastline 25-80 km (15-50 mi) over 5,000 years. In 2005, Hurricanes Rita and Katrina destroyed much of the delta and rising sea levels have increased erosion.