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Hello Dan -
It is well known that "Atlantis" was constructed by Plato for moral education from actual historical materials.
Two elements Plato used have long since been identified: memories of Minoan civil society, and remembrances of the invasions of the "Sea Peoples".
The third element Plato used to construct his moral tale was memories of a massive Atlantic impact produced mega-tsunami which occured ca 1150 BCE, and which is fairly well documented both in Mayan records as well as in archaeological sites:
http://abob.libs.uga.edu/bobk/ccc/ce010702.html
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