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Mars clays may have volcanic source

Deposits didn’t need flowing water to form, new research suggests

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2:08pm, September 9, 2012

Ancient clay deposits on Mars may not indicate that the Red Planet was originally a warm, wet place, as scientists have thought. Instead of needing liquid water to form, many of Mars’ 4-billion-year-old clays could have originated from cooling lava, researchers report online September 9 in Nature Geoscience.

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