What is a baymouth barrier?
A barrier that partially encloses a bay at its entrance.
What is a cuspate foreland?
Littoral drift from two directions with good sediment supply. Extends out into the sea in a triangular shape.
What is a barrier island?
A barrier island is a long, thin, sandy stretch of land, oriented parallel to the mainland coast that protects the coast from the full force of powerful storm waves. Between the barrier island and the mainland is a calm, protected water body such as a lagoon or bay.
Define characteristics of a tidally dominated coast
Wave processes limited since they are spread over the tidal cycle (high tidal ranges) or in a sheltered environment such as a lagoon or estuary. Coastal environment dominated by incursion of tidal waters which promote deposition.
Sediment input from river systems is often limited
Vegetation systems often important (e.g. salt marshes and mangroves).
What is a river dominated coast?
Dominated by the input of fluvial sediments which exceeds transport capacity of wave action.
A concordant, longitudinal, or Pacific type coastline occurs where beds, or layers, of differing rock types are folded into ridges that run parallel to the coast. The outer hard rock (for example, granite) provides a protective barrier to erosion of the softer rocks (for example, clays) further inland.
A discordant coastline occurs where bands of different rock type run perpendicular to the coast. The differing resistance to erosion leads to the formation of headlands and bays.
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