Salt marshes may be formed behind a spit. The zone behind a spit becomes a sheltered area. Water movement slows down and so more material is deposited. Deposition may form a salt marsh.

Creates a salt marsh which can provide habitats for wildlife and a natural defence against erosion and flooding. Salt marshes are diverse ecosystems supporting many species.

The long stretch of salt marshes you see driving over Lowcountry bridges serve many purposes for the ecosystem, but their ...