How does an entire city like Heracleion disappear into the sea?

Question

And understand a city being destroyed in an earthquake, and things falling into the water, but how does an entire city slide under water and disappear, so there’s no evidence of it ever existing at all?

In: 3

Answer 1

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Answer 2

According to Wikipedia, the city was largely built on a type of clay that undergoes liquefaction during tremors. This happened and most of Heracleion slid underwater. Over subsequent years the stragglers left as the city completely vanished.