Raised Shoreline

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Short description: Ancient shoreline exposed above current water level
Isostatic Uplift sequence cartoon.jpg

A raised shoreline is an ancient shoreline exposed above current water level.[1] These landforms are formed by a relative change in sea level due to global sea level rise, isostatic rebound, and/or tectonic uplift. These surfaces are usually exposed above modern sea level when a heavily glaciated area experiences a glacial retreat, causing water levels to rise. This area will then experience post-glacial rebound, effectively raising the shoreline surface.

Examples of raised shorelines can be found along the coasts of formerly glaciated areas in Ireland[2] and Scotland, as well as in North America. Raised shorelines are exposed at various locations around the Puget Sound of Washington State.[3]

See also

  • Isostasy
  • Landform
  • Machair
  • Marine terrace
  • Parallel Roads of Glen Roy
  • Raised beach
  • Terrace (geology)
  • Wave-cut platform

References

  1. http://www.encyclopedia.com/doc/1O112-raisedshorelines.html [|permanent dead link|dead link}}]
  2. http://www.askaboutireland.ie/.../changing-sea-levels/ [yes|permanent dead link|dead link}}]
  3. Kovanen, Dori J.; Slaymaker, Olav (December 2004). "Relict shorelines and ice flow patterns of the northern puget lowland from lidar data and digital terrain modelling" (in en). Geografiska Annaler: Series A, Physical Geography 86 (4): 385–400. doi:10.1111/j.0435-3676.2004.00239.x. ISSN 0435-3676. http://www3.interscience.wiley.com/journal/118781323/abstract. 



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Categories: [Coastal geography] [Coastal and oceanic landforms]


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