Why are beaches not found all along the coast? If not beaches, what else can be found along the coast.
Not all coastlines have beaches. Some have cliffs, such the Great Australian Bight, which forms a significant part of the southern coast of Australia. The limestone cliff portion of the Bight is over 1000 km in length and between 60 and 120 metres in height.
Beaches are only formed when land gently slopes into the sea. They
typically occur in areas along the coast where wave or current action deposits and reworks sediments.
The sediments can be sand, pebbles, or biological materials such as shells and coralline algae.
In addition to forming on ocean coastlines, some beach for on lake shores.