Regression (geology)
As regression (from Latin. Regredior, regress) is in the geology , the seaward retreat a coastline and the thus caused changes in the Sedimentationsdynamik the affected sedimentary basin designated. A regression can result from the progressive pouring of sediments into the coastal area of a land mass ( normal regression , see → Progradation ), the tectonic increase of a land mass or a lowering of the global ( eustatic ) sea level, e.g. B. be due to the climatic binding of water in continental ice masses (both English. Forced regression ).
A regression is expressed in the sediment sequence by a reversal of z. B. a more marine deposition environment to a more terrestrial deposition environment or not infrequently in the form of layer gaps .
In contrast, there is transgression , in which the coastline migrates inland.
literature
- Hans Murawski: Geological Dictionary . 8th edition. Enke Verlag, Stuttgart 1983, ISBN 978-3-432-84108-3 , p. 181 .
- Dieter Richter: General Geology . 3. Edition. de Gruyter Verlag, Berlin - New York 1985, ISBN 3-11-010416-4 , pp. 191 .
Web links
- Keyword regression in the Schlumberger Oilfield Glossary on the Stratigraphy website of the Society for Sedimentary Geology