American Indians have been telling the legend of the eruption of Mt. Mazama in Oregon the formed what is now Crater Lake National Park for 7,700 years, according to Logarithmic History.
A new paper claims that Australian Aborigines have kept alive the story of the formation of a few small volcanos in Budj Bim National Park near Melbourne for 37,000 years.
Australia is rather lacking in violent geology, so I guess even these small eruptions (so small that I can’t find a picture showing a recognizable volcano) might have made a lasting impression upon witnesses.
What other really old events stayed alive in human memory?
There are various theories that what is now the Black Sea was suddenly created by a flood from the Mediterranean Sea or from the Caspian Sea, inundating what had previously been nice low level land. Perhaps this hypothetical Black Sea Deluge is the origin of the stories of Noah’s Flood and/or Atlantis?