Marshy areas are wetlands that are characterized by having very wet and muddy soil. Quags, BOGS, and FENS are all types of marshy areas. Quags are wetlands that are usually found in low-lying areas and are often covered with water. BOGS are wetlands that are usually found in colder climates and are characterized by acidic soil and spongy ground. FENS are wetlands that are usually found in areas with high groundwater levels and are characterized by having a high mineral content in the soil.