Flying Over Gulf Marshes: The Spill Is Vast, the Booms Are Small

I learned a new word on my first day on the Louisiana Gulf Coast: marshballs. Flying over what used to be vast stretches of marshland, our pilot said that after decades of blocking the Mississippi River from releasing more sediment into the wetlands and years of dredging canals for oil exploration, thousands of acres of marshes had eroded and been transformed into broken marsh or open water.
Then Hurricane Katrina came along and rolled the remaining pieces into marshballs—tiny little islands of grass that barely rise above the surface.