Depression (geology)

A watering hole is a natural depression where water collects and animals come to drink.
Karst closed depression with permanent lake Stymfalia, Peloponnese, Greece. Seasonal abundant precipitation drained by 3 sinkholes

In geology, a depression is a landform sunken or depressed below the surrounding area. Depressions form by various mechanisms.

Types

Erosion-related:

Collapse-related:

  • Sinkhole: a depression formed as a result of the collapse of rocks lying above a hollow. This is common in karst regions.
  • Kettle: a shallow, sediment-filled body of water formed by melting glacial remnants in terminal moraines.[3]
  • Thermokarst hollow: caused by volume loss of the ground as the result of permafrost thawing.

Impact-related:

Sedimentary-related:

Structural or tectonic-related:

Volcanism-related:

List of depressions

See also

References

  1. ^ a b "Dictionary of Geologic Terms – B". US Geochemical. Retrieved 2017-09-09.
  2. ^ Twidale, C.R., and Bourne, J.A., 2018. Rock basins (gnammas) revisited. Géomorphologie: Relief, Processus, Environnement, Vol. 24, No. 2. January 2018. Retrieved 9 June 2020. doi:10.4000/geomorphologie.11880
  3. ^ "Dictionary of Geologic Terms – K". US Geochemical. Retrieved 2017-09-09.
  4. ^ "Glossary of Important Terms in Glacial Geology – Peripheral Depression". Montana State University. 1999. Archived from the original on 2006-08-29. Retrieved 2006-08-25. Cites American Geological Institute's Glossary of Geology (3rd edition, revised in 1987).
  5. ^ "Dictionary of Geologic Terms – C". US Geochemical. Retrieved 2017-09-09.

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