click below
click below
Normal Size Small Size show me how
Volcano Revision
Question | Answer |
---|---|
Active volcano | Volcanoes that are currently erupting or showing signs of unrest EG) Mount Etna |
Dormant Volcano | A volcano that is not currently erupting or expected to erupt in the near future but is highly probable to do so in the far future EG) Kilimanjaro Tanzania |
Extinct Volcano | A volcano that will never erupt again because it has lost its source of magma EG) Slemish Mountain Antrim |
Fissure Eruption | eruptions that occur on divergent plate boundaries where a fissure has formed in the earth's crust. Magma forces its way of through the crust and erupts as a curtain of fire |
Central vent Eruption | eruptions that occur from a vent in the earth's surface, usually at a convergent plate boundary |
Hot spot eruptions | occur when a plume of lava rises near the earths crust, it eventually breaks through the earths crust like a blow torch. eg) tha Hawaiian Islands |
Plutons | intrusive volcanic features like a batholith |
4 ways of predicting volcanic activity | 1. Changes in the shape of a volcano 2. Heat and gases 3. Seismic Activity 4. History of eruption. |