Image: Sierra Grande Andesite

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Description: 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.
Title: Sierra Grande Andesite
Credit: https://www.flickr.com/photos/jsjgeology/8455685503/sizes/o/in/set-72157632720256842/
Author: James St. John (jsj1771) https://www.flickr.com/people/jsjgeology/
Usage Terms: Creative Commons Attribution 2.0
License: CC BY 2.0
License Link: https://creativecommons.org/licenses/by/2.0
Attribution Required?: Yes

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Sierra Grande

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