Former island



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
 * Any of several former Islands in the River Thames, England
 * Sevan Island, a former island in Armenia, now a peninsula
 * Urk, a former island now part of the reclaimed Noordoostpolder in the Netherlands, a victim of the Zuiderzee Works, a land fill designed by Cornelis Lely
 * Sakurajima, a former island now joined to the mainland in Japan
 * Mount Muria, now part of Java
 * Harriet Island, a former island in the Mississippi River in Saint Paul, Minnesota, now joined to the mainland of Saint Paul.