Image: Dacite

Dacite

Dacite (17.5 cm x 11 cm) Hammond Island, Torres Strait.

Photographer:
Stuart Humphreys
Rights:
© Australian Museum

Notes

Dacite is a common, acidic volcanic rock composed of quartz and sodic plagioclase, along with small amounts of biotite and/or hornblende, and/or pyroxene.

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Tags igneous rocks, volcanic, acid, geosciences, mineralogy, specimen, volcano,