English: A mantlexenolith of peridotite, showing chemical weathering of olivine (green) to iddingsite (brown). The most likely cause of this alteration (or difference in amount of alteration) is the fracture surface: the rock was fractured first exposing the right side of the peridotite, then later, the left side, keeping it fresher and less chemically weathered.
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(UTC) (Uploaded on Commons at 2011-02-26 11:20:48 (UTC)/Original uploaded at 2010-08-09 01:31:18)
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2010-08-09 01:31:18 Matt Affolter 3,648×2,736 (2.89 MB) ({{Information |Description = A [[mantle]] [[xenolith]] of [[peridotite]], showing [[chemical weathering]] of [[olivine]] to [[iddingsite]]. The most likely cause of this alteration (or difference in amount of alteration) is the fracture surface: the )
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