Image: Andesite

Andesite

Andesite (10 cm x 7.5 cm), Munro Bay, Northland, North Island, New Zealand.
 

Photographer:
Stuart Humphreys
Rights:
© Australian Museum

Notes

Andesite is an intermediate, commonly porphyritic, basic volcanic rock composed of plagioclase, pyroxene, hornblende and/or biotite.

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Tags andesite, igneous rocks, volcanic, volcanoes, specimen, mineralogy, geosciences,