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Andrew Alden

Ochre from Zimbabwe

By September 18, 2013

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ochreA reader in Zimbabwe sent in a photo of his sedimentary rock—a lovely specimen of ironstone displaying the arresting colors of limonite and hematite. As a bonus, he includes a photo of an ancient rock-art site that uses these same minerals as pigments. Be sure to click on the thumbnail images for the full-sized images.

Why not submit one of your own favorite sedimentary rocks?
Ironstone — Michael Tucker photo

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