English: Andesite (7.3 cm across at its widest) - vesicular andesite from a 1.9 million year old lava flow (upper Upper Pliocene) on the eastern side of Sierra Grande Shield Volcano, Raton-Clayton Volcanic Field, northeastern New Mexico, USA. The rock is composed of plagioclase feldspar, augite pyroxene, hypersthene pyroxene, olivine, plus other minerals.
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