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  • Peridotite
  • Granite
  • Andesite
  • Basalt
  • Phenocryst
  • Porphyritic
  • Dyke
  • Sill
  • Columnar Jointing
  • Pillow Lavas
  • A coarse grained igneous rock made up almost entirely of olivine plus small amounts of augite and plagioclase feldspar
  • A coarse grained igneous rock made up of quartz, feldspar and mica
  • A fine grained igneous rock made up of quartz, feldspar, mica and a small amount of augite
  • A fine grained igneous rock made up of feldspar, augite and a small amount of olivine
  • A large crystal in an igneous rock
  • Igneous texture formed by two stage cooling
  • A discordant, tabular or sheet-like igneous intrusion
  • A concordant, tabular or sheet-like igneous intrusion
  • Formed in the interior of lava flows, sills and dykes by cooling and contraction
  • Formed by the submarine eruption of basalt