A Marsh in Flux (IMAGE) Columbia Climate School Caption Inorganic sediment supply to the Jo Co marsh has decreased dramatically over the past few centuries. While the overall accretion rate has gone up due to organic sediments, the lack of mineral sediments weakens the marshes. Credit Peteet <em>et al</em>. Usage Restrictions None 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.