Peresyp

A peresyp (пересыпь) or a bay-mouth bar[1] is a narrow sandbar that rises above the water level (like a spit) and separates a liman or a lagoon from the sea.

Unlike tombolo bars, a peresyp seldom forms a contiguous strip and usually has one or several channels (called girlo (гирло) in Russian) that connect the liman and the sea.

Similarly to spits, peresyps are formed by actions of surf zone currents from sand, gravel/pebbles, and crushed shells as a result of longitudinal (longshore drift) or transverse transport of sediment.

[3] Sometimes a peresyp may be formed when two spits on the two sides of a liman grow and eventually meet.

The sea water evaporates within the closed liman, thus increasing its salinity.