Tectonics
Volcanoes
Tectonics
Volcanoes
Volcanic bombs,
ash, lava, gases
Magma chamber
Parasitic cone
Crater
Main vent
Tectonics
Volcanoes
Tectonics
Volcanic Emissions
Tectonics
Tectonics
Do all volcanoes erupt?
Active volcano – liable to erupt e.g. Mt Etna.
Dormant (sleeping) volcano – a volcano which has not
erupted for many years. For example, Mt Pinatubo
erupted in 1991 after 500 years of dormancy.
Extinct volcano – a volcano which has not erupted for
many thousands or millions of years e.g. Edinburgh.
However, it is often very difficult to tell whether a volcano
will erupt again…El Chichon, Mexico erupted in 1982 after
being dormant for approximately 1200 years!
Tectonics Why do volcanoes occur?
Tectonics Why do volcanoes occur?
Tectonics
Why do volcanoes have
different shapes?
Tectonics
Why do volcanoes have
different shapes?
Tectonics
Shield
OR
Composite
???
Why do volcanoes have
different shapes?
Tectonics
Why do volcanoes have
different shapes?