Calderas, like Mount Vesuvius, consist of a large, cauldron-like hollow that forms after the emptying of a magma chamber during an eruption. Etna is ... where one tectonic plate converges with ...

Mount Etna in Sicily ... Most volcanic eruptions are caused by pieces of the Earth's crust, called tectonic plates, moving towards each other. Some volcanoes, like Mauna Loa in Hawaii are caused ...