The collapse happened about 7,000 years ago, with a date of 7,200 years before present indicated by radiocarbon dating on the deposit; it was not witnessed in historical records.
The collapse happened about 7,000 years ago, with a date of 7,200 years before present indicated by radiocarbon dating on the deposit. This event probably lasted only 12 minutes based on simulations; it was not witnessed in historical records.