Mississippi Delta Marshes in a State of Irreversible Collapse, Tulane Study Shows (image) Tulane University Share Print E-Mail Caption Salt marshes about 30 miles (50 km) southeast of New Orleans are vulnerable to drowning. Credit Photo by Torbjörn Törnqvist Usage Restrictions Just credit the prrofessor. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.