December 16, 2011, 8:48 am

A borderland, in oceanography or coastal waters geology, is an undersea feature name defined by the International Hydrographic Organization (IHO) as  “a region adjacent to a continent, normally occupied by or bordering a shelf and sometimes emerging as islands, that is irregular or blocky in plan or profile, with depths well in excess of those typical of a shelf.”


In the coastal and oceanographic literature, there are numerous world regions described as coastal waters borderlands. Some prominent examples are the Chukchi Sea borderland and the southern California borderland.

This article is written at a definitional level only. Authors wishing to expand this entry are inivited to expand the present treatment, which additions will be peer reviewed prior to publication of any expansion.

Further Reading

  • Physical Oceanography Index
  • Steve Kershaw, Andy Cundy. 2000. Oceanography: an earth science perspective. Page 199 276 pages





Baum, S. (2011). Borderland. Retrieved from


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