File:Iddingsite.JPG

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Summary

A <a href="https://en.wikipedia.org/wiki/Mantle_(geology)" class="extiw" title="en:Mantle (geology)">mantle</a> <a href="https://en.wikipedia.org/wiki/xenolith" class="extiw" title="en:xenolith">xenolith</a> of <a href="https://en.wikipedia.org/wiki/peridotite" class="extiw" title="en:peridotite">peridotite</a>, showing <a href="https://en.wikipedia.org/wiki/chemical_weathering" class="extiw" title="en:chemical weathering">chemical weathering</a> of <a href="https://en.wikipedia.org/wiki/olivine" class="extiw" title="en:olivine">olivine</a> (green) to <a href="https://en.wikipedia.org/wiki/iddingsite" class="extiw" title="en:iddingsite">iddingsite</a> (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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	Date/Time	Thumbnail	Dimensions	User	Comment
current	03:34, 6 January 2017		3,648 × 2,736 (2.89 MB)	127.0.0.1 (talk)	A <a href="https://en.wikipedia.org/wiki/Mantle_(geology)" class="extiw" title="en:Mantle (geology)">mantle</a> <a href="https://en.wikipedia.org/wiki/xenolith" class="extiw" title="en:xenolith">xenolith</a> of <a href="https://en.wikipedia.org/wiki/peridotite" class="extiw" title="en:peridotite">peridotite</a>, showing <a href="https://en.wikipedia.org/wiki/chemical_weathering" class="extiw" title="en:chemical weathering">chemical weathering</a> of <a href="https://en.wikipedia.org/wiki/olivine" class="extiw" title="en:olivine">olivine</a> (green) to <a href="https://en.wikipedia.org/wiki/iddingsite" class="extiw" title="en:iddingsite">iddingsite</a> (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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