Collapse of the Caldera

Title: Collapse of the Caldera
Description: volcanic activity, before the final act: the catastrophic eruption of the Sesia supervolcano some 282 million years ago.
It is estimated that more than 500 km3 of ash and lapilli were erupted in a very short time; at the same time, the entire volcanic apparatus collapsed and huge blocks collapsed into the caldera that had formed, a chasm at least 13 km in diameter. Much of the erupted material fell back into the caldera, mixing with the blocks and forming the chaotic set of rocks
Event process: eruption
Has super event: Permian Magmatic Event
Older named age: Permian
Numeric age: 282 My

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Items with "Related to event: Collapse of the Caldera"
Title	Class
Megabreccia (Volcanites and volcanoclastites)
Prato Sesia GEOSITE