1. Marshes developed in sinkhole terrain; swampy solution fens [10]. 2. Marsh or swamp formed by plants overgrowing a karst lake or seepage. Synonyms: (French.) marais karstique; (German.) Karstsumpf ?; (Greek.) karstikon elos; (Italian.) palude o acquitrinio carsico; (Russian.) karstovoje boloto; (Spanish.) laguna karstica; (Turkish.) karst batakligi; (Yugoslavian.) lokva, kal.