It was formed by the collision of the Eurasian and African tectonic plates. The water-saturated African plate was pushed into the lower layers of the Earth, where under the influence of temperature water evaporated and caused the melting of the rocks of the mantle. Concentrated as a result of this process, magma was pushed upwards under high pressure, where it came to the surface at the weakest point of the earth's crust, forming volcanoes that are part of the volcanic chains in the Campania area.
