Which coast type is characterized by retreat and cliff erosion with little sediment deposition?

Which coast type is characterized by retreat and cliff erosion with little sediment deposition?

• A. Depositional Coast
• B. Estuary
• C. Fjord
• D. Erosional Coast

Answer: (D)

Coasts shaped mainly by the action of waves eroding cliffs and removing material show shoreline retreat with exposed rock faces and little new sediment building up beaches. In these high-energy environments, erosion dominates over deposition, so the shoreline slowly moves landward as cliffs collapse and rock is carried away. Features you’d expect include prominent sea cliffs, wave-cut platforms, and minimal sandy beaches. This matches an erosional coast, where retreat and cliff erosion are the defining processes and sediment deposition is limited. Other coast types don’t fit as well: a depositional coast builds up landforms from abundant sediment and often has beaches and deltas; an estuary is a tidal river-mouth environment with mixing and sediment deposition within a sheltered area; a fjord is a glacially carved valley flooded by sea water, characterized more by its U-shaped profile and depth than by ongoing cliff retreat with little deposition.

Coasts shaped mainly by the action of waves eroding cliffs and removing material show shoreline retreat with exposed rock faces and little new sediment building up beaches. In these high-energy environments, erosion dominates over deposition, so the shoreline slowly moves landward as cliffs collapse and rock is carried away. Features you’d expect include prominent sea cliffs, wave-cut platforms, and minimal sandy beaches.

This matches an erosional coast, where retreat and cliff erosion are the defining processes and sediment deposition is limited. Other coast types don’t fit as well: a depositional coast builds up landforms from abundant sediment and often has beaches and deltas; an estuary is a tidal river-mouth environment with mixing and sediment deposition within a sheltered area; a fjord is a glacially carved valley flooded by sea water, characterized more by its U-shaped profile and depth than by ongoing cliff retreat with little deposition.