Volcanoes
There are 3 different types of volcanoes:
A volcano is a mountain that opens downward to a pool of molten rock deep below the surface of the earth - from the mantle! When pressure builds up, eruptions occur. Gases and rock shoot up (volcanic bombs) through the opening and spill over or fill the air with lava fragments. A huge ash cloud appears in the sky above the erupting volcano and pyroclastic flow, a destructive flow of lava and hot ash fragments erupt out of it explosively - destroying everything in its path.
As well as the danger from the hot lava, an erupting volcano can trigger are life threatening things:
Down below are other features of an erupting volcano!
- Active - eruptions can be anytime and often.
- Dormant - has been a while since it has erupted, but could at anytime.
- Extinct, meaning it hasn't erupted in a very long, long time so it probably won't ever again.
A volcano is a mountain that opens downward to a pool of molten rock deep below the surface of the earth - from the mantle! When pressure builds up, eruptions occur. Gases and rock shoot up (volcanic bombs) through the opening and spill over or fill the air with lava fragments. A huge ash cloud appears in the sky above the erupting volcano and pyroclastic flow, a destructive flow of lava and hot ash fragments erupt out of it explosively - destroying everything in its path.
As well as the danger from the hot lava, an erupting volcano can trigger are life threatening things:
- tsunamis
- flash floods
- earthquakes
- mud flows
- rock falls.
Down below are other features of an erupting volcano!
Formation of volcanoes
- Volcanic eruptions can happen at destructive and constructive boundaries, but not at conservative boundaries. Earthquakes occur at conservative boundaries because of the friction.
- As pressure in the molten rock builds up it needs to escape somewhere. So it forces its way up “fissures” which are narrow cracks in the earths crust. Once the magma erupts through the earth’s surface it’s called lava.
- Some volcanoes can even happen underwater along the seabed or ocean floor!