A regressive delta is a body of sediment that forms at the landward end of a

gut Gut or guts may refer to: Anatomy * Abdomen or belly, the region of a vertebrate between the chest and pelvis * Abdominal obesity or "a gut", a large deposit of belly fat * Gastrointestinal tract or gut, the system of digestive organs * Ins ...

. In contrast to

river deltas A river delta is a landform shaped like a triangle, created by deposition of sediment that is carried by a river and enters slower-moving or stagnant water. This occurs where a river enters an ocean, sea, estuary, lake, reservoir, or (mo ...

, regressive deltas are not caused by fluvial sedimentation but by marine sedimentation. During storm events, sediment-bearing sea water is pressed through the gut into the adjacent lagoon. Sedimentation takes place immediately after the water has passed the gut because the velocity of the current strongly decreases. The surplus water will leave the lagoon at leeward guts. Well-known regressive deltas on the Baltic Sea coast are those of the

Prerower Strom The Prerower Strom, Prerow Strom
at www.ostseeferieninfo.de. Retrieved 27 Jun 2019. or ...

in northeast Germany and the

Świna The Świna (; Pomeranian: ''Swina'') is a river in northwest Poland, between 2 and 4 km from the German border. It flows from Szczecin Lagoon to the Baltic Sea between the islands of Uznam and Wolin. It is a part of the Oder estuary, and carr ...

in northwest Poland.landschaften/prerowstrom/prerowstrom.html
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References

{{Coastal geography Coastal geography