Spit
A spit is a coastal formation which points as a tongue into the sea. It is formed by a wave-driven current that transports sediment along a shore. Due to this longshore transport, the coast will be extended in the long shore direction where the shore abruptly ends. If both sides of the spit are influenced by such a long shore transport, a bi-lateral spit is formed. An example can be found at Skagen, Denmark (see Fig. 23).

Tombolo
An obstacle in front of a coast, for example a shipwreck, a rock formation or an offshore breakwater, can result in a tombolo. Due to reduced transport capacity in the shadow zone between the obstacle and the coast, a shoal will develop. If the obstacle has dimensions comparable to the distance from the shore, then a peninsula tombolo can be formed (see Fig. 24).

Pocket beach
A pocket beach is a typical coastal formation which occurs at rocky coasts. Between two protruding rock formations an often relatively small amount of sediment can be confined (i.e. no sediment passes the rock headlands). This amount of sediment forms a beach which will be aligned to the dominant wave crest direction (see Fig. 25).