One will see a layer of smooth stones, popularly called fluitati [diluvium], and over these another layer of smaller pebbles, thirdly sand, and finally earth, and you will see this repeatedly...up to the summit of the Mountain. This clearly shows that the order has been caused by many floods, not just one.

De' Corpi Marini che su Monti si Trovano (1721), 57. Trans. Ezio Vaccari