Pocket Beaches (PB) are beaches included within bays whose headlands that delimit them influence the internal wave climate and consequently the dynamics of sediments and the evolution of the shore line.
Their training can be:
- Due to the solid contribution of small streams that flow into it;
- From the breakup of a cliff behind it;
- Pocket beaches whose sediments have deposited due to an exceptional storm or a tsunami which have brought sediments into the bay that cannot be removed from the ordinary wave climate;
- Or from sediments produced by the over-flooding of a nearby watercourse that changed the shape of the post outside the bay, favoring its “invasion” by external sediments.