volcanoes
volcano types
explosive volcano
The common image of red hot lava flowing down Kilaueaand covering roads and houses is an effusive eruption. However, predominantly explosive volcanoes such as Mount St. Helens can show effusive behavior, such as the dome growth stages following the 1980s explosive eruptions and again in 2004
sill volcano
VOLCANOES - a volcano is an opening, or rupture, in a planet's surface or crust, which allows hot magma, volcanic ash and gases to escape from the magma chamber below the surface. Volcanoes are generally found where tectonic plates are diverging or converging. A mid-oceanic ridge, for example the Mid-Atlantic Ridge, has examples of volcanoes caused by divergent tectonic plates pulling apart; the Pacific Ring of Fire has examples of volcanoes caused by convergent tectonic plates coming together.
vent volcano
SUPER VOLCANOES - is a volcano capable of producing a volcanic eruption with an ejecta volume greater than 1,000 km3 (240 cu mi). This is thousands of times larger than normal volcanic eruptions. Supervolcanoes can occur when magma in the mantle rises into the crust from a hotspot but is unable to break through the crust. Pressure builds in a large and growing magma pool until the crust is unable to contain the pressure.
Geography Lesson: What is a Volcano?