Why are so many ancient Mediterranean costal cities found below water after a tsunami or volcanic eruption and not buried under rock and silt or Ash like Pompeii?

Question

Why are so many ancient Mediterranean costal cities found below water after a tsunami or volcanic eruption and not buried under rock and silt or Ash like Pompeii?

In: 4

Answer 1

Ancient mediterranean coastal cities are under water because the water levels rose very slowly at the end of the last ice age, submerging them. It was not a catastrophic event like Pompeii.