It starts two ways.
1.Two tectonic plates move away from each other and magma goes through the space they leave forming a volcano.
2.Two tectonic plates move together and one slides under another dragging water into the mantle boiling the water which melts rock forming magma which rises to the surface forming a volcano.
"But the place where volcanoes begin is in the deeper regions of the Earth's crust and uppermost layers of the mantle".
Jingbo Volcano is in China. It begins with the letter j.
Mount Quesibra in Barbados
Xianjindao is a volcano in North Korea. It begins with the letter x.
Muana LoaMuana LaniMuana Kia
Jumbo because they are big -Rae
Mount. St Helen's!
ejecta
* Ol Doinyo Lengai Volcano in Tanzania
Mauna Kea or Mauna Loa
Snæfellsjökull A volcano in Iceland.
yes, I think so. because, very large volume of magma is ejected and then magma chamber can't support the volcano above it. then the volcano begins to sink into the earth.magma chamber empties and a new collapsed depression occurs.
Jingbo is a volcano in China. It begins with the letter J.