Civil Thinking

Magma composition and volcano type

We will consider three general compositions of magma/lava:

  • Basalt (mafic)- associated with shield volcanoes, flood basalts, monogenetic fields and ocean floor volcanoes
  • Andesite (intermediate)- associated with stratovolcanoes
  • Rhyolite (felsic)- associated with large calderas

We will start with the mafic composition:  Basalt…

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