eruptions that occurred 305,000 to 258,000 years ago. Later, the eruption of voluminous pyroclastic flows, and volcanic ash, caused the progressive collapse of the volcanic cone, which created the caldera, in which Lake Vico now lies, by about 138,000 years ago.

History

The Vicano river is the original outlet from Lake Vico, it flowed down the valley towards the Treja River, flowing out from the point where the caldera wall is less elevated. At an

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