400 million years ago

Events

• Cthulhu Mythos: 350 million years ago. A cataclysm raises the land masses that become Ponape and R'lyeh, as well as destroying several marine Elder Thing cities. ("At the Mountains of Madness" by H.P. Lovecraft; "Timeline of the Cthulhu Mythos" by Shannon Appel, from Encyclopedia Cthulhiana by Daniel Harms)

• Cthulhu Mythos: Soon after 350 million years ago. Cthulhu and his kin arrive and settle on the landmass that becomes R'lyeh. The Elder Things war with Cthulhu, but they eventually make peace. Cthulhu is permitted to keep his current surface territories, and the Elder Things keep the rest of the planet. It is around this time that the Deep Ones enter the service of Cthulhu, and help build the city of R'lyeh. ("At the Mountains of Madness" by H.P. Lovecraft; "Timeline of the Cthulhu Mythos" by Shannon Appel, from Encyclopedia Cthulhiana by Daniel Harms)

• Cthulhu Mythos: K'n-yan is founded around this time, according to legend. ("The Mound" by H.P. Lovecraft and Bishop)

• Real World: 318 million years ago. Beginning of Pennsylvanian Period. The first reptiles appear on Earth.

• Cthulhu Mythos: 318 million years ago. Yig is involved in the creation of reptiles. (Encyclopedia Cthulhiana by Daniel Harms)

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