Regional map of the Mississippi River delta plain, Louisiana

Regional map showing historical (1932-2004) wetland losses and geologic setting of the Mississippi River delta plain, Louisiana. The delta plain was constructed by sediment transported through distributary channels that began prograding about 7,000 years ago and deposited sediment in overlapping delta lobes. Thick aggradational peats that accumulated in interdistributary areas underlie much of the emergent delta-plain wetlands. White box encompasses study sites where coring and bathymetric surveys were conducted as part of the Gulf Coast Subsidence Project.