Martian Clays Have Not All Been Formed by Liquid Water
read more at Anne’s Astronomy News http://annesastronomynews.com/
Discovered in 2005, the clays in the southern hemisphere of Mars is often considered as a proof of the existence of liquid water on the Red Planet at a very early period of between 4.5 and 4 billion years. But the work of a French-American team led by researchers at the Institute of Chemistry of materials and environments Poitiers (CNRS / Université de Poitiers) questioned this interpretation. In an article that was published on September 9 on the website of the journal Nature Geoscience , they show that these clays are likely to be of magmatic origin. The many similarities between the Martian clays and those of volcanic origin collected on the Mururoa atoll support their hypothesis.
This image reveals exposed layers in Noctis Labyrinthus on the southern hemisphere of Mars, which may contain signatures of iron bearing sulfates and phyllosilcate (clay) minerals. Image Credit: NASA/JPL-Caltech/University of Arizona
Source: Centre national de la recherche scientifique (CNRS)
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2012-09-10 15:16:01
Source: http://annesastronomynews.com/martian-clays-have-not-all-been-formed-by-liquid-water/
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