What geological phenomena cause lost lands?

Lost lands are prehistoric islands or continents believed to have disappeared due to catastrophic geological phenomena. While many lost land concepts originate in mythology, philosophy, or obsolete scientific ideas like nineteenth-century theories of sunken landmasses, modern plate tectonic simulations have successfully confirmed the existence of real submerged continental regions.

What we know

• Lost lands are islands or continents believed to have existed during prehistory and subsequently disappeared due to catastrophic geological phenomena. [2]
• Some lost land theories originated from scholarly or scientific hypotheses before being adopted by writers, occultists, and New Age movements. [2]
• The development of plate tectonic simulation software has allowed scientists to discover and confirm real lost lands, such as Greater Adria in 2019. [2]
• Nineteenth-century European and American scholars once speculated about a submerged continent called Lemuria to account for biological and geological similarities across Africa, Madagascar, India, and Australia. [4]

Still open

• The classification of specific lost lands as continents, islands, or other geographic categories can be subjective, as seen with Atlantis being described as both.

Where to go next

• how it workedHow do plate tectonics submerge landmasses?
• a case in pointWhat is the Greater Adria continent?
• compared withHow does plate tectonics differ from catastrophism?
• the bigger pictureWhat are submerged continents?
• how we knowHow do phantom islands differ from lost lands?
• an unexpected connectionHow did nineteenth-century geological theories influence Tamil literary revivalism?European scholarly theories about a sunken continent called Lemuria were adapted by Tamil revivalists to create the legend of Kumari Kandam as the cradle of their civilization.

Sources

• [1]lost land (Wikidata Q3276230) · CC0 1.0
• [2]Lost lands · CC BY-SA 4.0
• [3]Submerged continent · CC BY-SA 4.0
• [4]Kumari Kandam · CC BY-SA 4.0
• [5]Forgotten continent · CC BY-SA 4.0