Igneous Rocks

• What are the fine grained Igneous rocks?

  1. Rhyolite
  2. Andesite
  3. Basalt
• Medium Grained Igneous Rocks

  1. Dolerite
• Coarse Grained Igneous Rocks

  1. Granite
  2. Gabbro
  3. Peridotite
• Silic Rocks

  1. Rhyolite
  2. Granite
• Intermediate Rocks

  1. Andesite
• Mafic Rocks

  1. Basalt
  2. Dolerit
  3. Gabbro
• Ultra-Mafic Rocks

  1. Peridotite
• What do Silic rocks contain?

  1. Quartz
  2. Orthroplause Feldspar
  3. Plagiouclause Feldspar
  4. Biotite Mica
  5. Muscovite Mica
• What do Intermediate Rocks Contain?

  1. Quartz
  2. Orthroplause Feldspar
  3. Plagioclause Feldspar
  4. Biotite
  5. Hornblende
• What do Mafic Rocks contain?

  1. Olivine
  2. Augite
  3. Plagioclause Feldspar
• What do Ultra-Mafic Rocks Contain?

  1. Olivine
  2. Augite
• Medium Grained


  1mm - 3mm
• Fine Grained


  <1mm
• Coarse Grained


  >3mm