A former island is a mass of land that was once an
island, but has been joined to a mainland, another island, or engulfed by a body of water. The process of joining might be the result of volcanic activity, moving tidal sands, or through
land reclamation. Islands engulfed by the sea may have lowered because of
subsidence, tectonic activity, erosion, or
rising sea levels. For example, the
New Moor island in
Bangladesh existed in the 1970s, but was engulfed by the
Bay of Bengal in 2011.
Examples
Eldøyane, a partially artificial former island in
Norway
Johnson, H & Kuwahara, S (2016), "
Sakurajima: Maintaining an island essence", Shima: The International Journal of Research into Island Cultures, vol. 10, no.1, pp. 48–66.