Image: Komatiite (fresh surface)

Komatiite (fresh surface)

Komatiite (fresh surface) (10 cm x 6 cm). Ravensthorpe, Western Australia.

Stuart Humphreys
© Australian Museum


Komatiite is high in magnesium and crystallised at high temperatures. It commonly displays a spinifex (spiky grass) texture consisting of intergrown skeletal and bladed olivine and pyroxene crystals in a glassy groundmass. Most are Archaean in age.

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