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Diorite vs Tonalite - What's the difference?

diorite | tonalite |

As nouns the difference between diorite and tonalite

is that diorite is a grey intrusive igneous rock composed mostly of plagioclase feldspar, biotite, hornblende and/or pyroxene while tonalite is an igneous, plutonic rock composed mainly of plagioclase.

diorite

English

(wikipedia diorite)

Noun

(en noun)
  • (rock) A grey intrusive igneous rock composed mostly of plagioclase feldspar, biotite, hornblende and/or pyroxene.

    • Derived terms

    * dioritic * granodiorite * microdiorite

    tonalite

    English

    Noun

    (wikipedia tonalite) (en noun)
  • (geology) An igneous, plutonic rock composed mainly of plagioclase
  • (geology, dated) Quartz diorite.