Curiosity rolls on: Mars Science Laboratory project scientist Ashwin Vasavada
Planetary Radio: Space Exploration, Astronomy and Science
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What's the Difference Between Clay Minerals and Sulphates?
Sulphates form when water interacts with rock over a long period of time and actually changes the mineralogy. These sulphates might form more like salts that you might find when when a lake dries up. We don't know the exact nature of the sulphates yet. That's one of the things that we're hoping to find how exactly did these sulphates form, and did they form when the sediments were being laid down or did they form later as water was circulating through those sediments at a different time?
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