Three types of volcanoes
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Three Types of Volcanoes. Shield Volcanoes. Low silica level Low viscosity Lava High or low levels of gas Flattened mound Resembles a warrior’s shield. Mauna Loa, Hawaii. Piton de la Fournaise. Surtsey, Finland. Composite Volcanoes. High in silica High viscosity magma

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Shield volcanoes
Shield Volcanoes

  • Low silica level

  • Low viscosity Lava

  • High or low levels of gas

  • Flattened mound

  • Resembles a warrior’s shield





Composite volcanoes
Composite Volcanoes

  • High in silica

  • High viscosity magma

  • High levels of gas

  • Highly explosive

  • Cone shaped

  • Formed by layers of lava and ash





Cindercones
Cindercones

  • Low silica lava

  • High levels of gas

  • “Fire-fountain” eruptions

  • Commonly found on the flanks of shield volcanoes

  • Made from a pile of rock pieces

  • Structurally weak


Pu u ka pele hawaii on the flanks of mauna loa
Pu'u ka Pele, Hawaii(on the flanks of Mauna Loa)




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