Term | Definition |
Diorite | Origin: Intrusive, Plutonic
Magma type: Intermediate
Texture: Phaneritic
Common Minerals: Intermediate Plagioclase, Hornblende, Biotite, Augite |
Rhyolite | Origin: Volcanic and/or Plutonic
Magma type: Felsic
Texture: Porphyritic Aphanitic
Common Minerals: Na-Plagioclase, Hornblende, Biotite, Muscovite, Orthoclase, Quartz |
Vesicular Basalt | Origin: Extrusive, Volcanic
Magma type: Mafic
Texture: Aphanitic
Common Minerals: Ca-Plagioclase, Hornblende, Olivine, Augite |
Basalt | Origin: Extrusive, Volcanic
Magma type: Mafic
Texture: Aphanitic
Common Minerals: Ca-Plagioclase, Hornblende, Olivine, Augite |
Andesite | Origin: Extrusive, Volcanic
Magma type: Intermediate
Texture: Porphyritic Aphanitic
Common Minerals: Intermediate Plagioclase, Hornblende, Biotite, Augite |
Syenite | Origin: Intrusive, Plutonic
Magma type: Felsic
Texture: Phaneritic
Common Minerals: Na-Plagioclase, Orthoclase, Hornblende, Biotite (No Quartz) |
Peridotite | Origin: Intrusive, Plutonic
Magma type: Ultramafic
Texture: Phaneritic
Common Minerals: Ca-Plagioclase, Olivine, Augite |
Obsidian | Origin: Extrusive, Volcanic
Magma type: Intermediate to Felsic
Texture: Glassy
Common Minerals: None present |
Pink Granite | Origin: Intrusive, Plutonic
Magma type: Felsic
Texture: Phaneritic
Common Minerals: Na-Plagioclase, Hornblende, Orthoclase, Biotite, Muscovite, Quartz |
Gabbro | Origin: Intrusive, Plutonic
Magma type: Mafic
Texture: Phaneritic
Common Minerals: Ca-Plagioclase, Hornblende, Olivine, Augite |
Rhyolite (Llanite) | Origin: Volcanic and/or Plutonic
Magma type: Felsic
Texture: Porphyritic Aphanitic
Common Minerals: Na-Plagioclase, Hornblende, Biotite, Muscovite, Orthoclase, Blue Quartz |
Gray Granite | Origin: Intrusive, Plutonic
Magma type: Felsic
Texture: Phaneritic
Common Minerals: Na-Plagioclase, Hornblende, Orthoclase, Biotite, Muscovite, Quartz |
Tuff | Origin: Extrusive, Volcanie
Magma type: Felsic
Texture: Fragmental
Common Minerals: Volcanic Ash |
Scoria | Origin: Extrusive, Volcanic
Magma type: Mafic
Texture: Glassy
Common Minerals: None present |
Pumice | Origin: Extrusive, Volcanic
Magma type: Felsic
Texture: Glassy
Common Minerals: None present |