2015 Gulf of Mexico Dead Zone (IMAGE) NOAA Headquarters Caption Distribution of dissolved oxygen in bottom water west of the Mississippi River delta (July 28-August 3, 2015). Black line denotes area with less than two milligrams of oxygen per liter of bottom water. Credit Nancy N. Rabalais, LUMCON, and R. Eugene Turner, LSU. Usage Restrictions Credit: Nancy N. Rabalais, LUMCON, and R. Eugene Turner, LSU. License Licensed content 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.