![](http://www.alamy.com/thumbs/6/97901ED2-03DB-43AA-8EBF-4B5A8650A8EE/DH6KPA.jpg)
Specimen of geological rock showing meta rhyolite with a brown iron and manganese stain on iron fracture, Mauritania NW Africa
Size: 2598px × 3898px
Location: Islamic Republic of Mauritania, Western sub Saharan, North West, NW Africa,
Photo credit: © GS International / Alamy / Afripics
License: Licensed
Model Released: No
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