Dear Professors: Here is a sentence I read days ago. --------------------------------------------------------------- Today tropical swamps and marshes are undergoing the most rapid accumulation of peat, with rates in Borneo of 17m in 4000 years. --------------------------------------------------------------- I wonder how to distinguish the "swamp " and "marsh" here. As I know they are all different kinds of geographical phenomena ( but quite similar ) in this sentence. But they are of the same meaning according to my dictionary ( wet and lower land or the land with shallow water and grass ). Could you tell me what is the tiny difference? TIA Tianyi