• Composite volcanoes are formed by alternating layers (strata) of magma and ash.
  • A shield volcano has a very wide base and is much flatter on the top than a composite volcano.
  • Cinder cones are the smallest and most common type of volcano.
  • They are made of small fragments of rock, called cinders.
  • These cinders can be mafic, intermediate, or felsic in composition.
  • Most composite and shield volcanoes have nearby cinder cones.
  • The Pacific Ring of Fire is dotted by composite volcanoes.
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