Very large garnet crystals (porphyroblasts) formed by changes in temperature and pressure deep within the crust during mountain building accompanied by regional metamorphism. From Wrangell, Alaska.
By: shelley-jaye
Image: Credit: Callan Bentley, Mid-Atlantic Geo-Image Collection (M.A.G.I.C.) on GigaPan. CC BY Attribution 3.0
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License:
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Uploaded: 7 Jan 2020
Last Updated: 15 Jan 2020
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