Poseidonis
Fictional landmass / From Wikipedia, the free encyclopedia
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This article is about the fictional continent. For the Ballantine Books collection of stories, see Poseidonis (collection).
Poseidonis is the fictional last remnant of the lost continent of Atlantis, mentioned by Algernon Blackwood in his short story "Sand" (published in 1912) in his collection Four Weird Tales and also detailed in a series of short stories by Clark Ashton Smith. Smith based Poseidonis on Theosophical scriptures about Atlantis[1] (such as Secret Doctrine by Helena Blavatsky), and his concept of "the last isle of foundering Atlantis" is echoed by the isle of Númenor in J. R. R. Tolkien's legendarium.
![Thumb image](http://upload.wikimedia.org/wikipedia/en/7/75/Poseidonis-map.jpg)