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List of evidence for water on Mars
serpens
post Aug 27 2016, 03:14 AM
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Well Spirit at Tyrone demonstrated that a thin layer of regolith can provide for a relative humidity gradient protecting hydrated salts. If the regolith is breached then the atmosphere acts as a desiccant. This could explain the appearance and then disappearance of limited amounts of hydrated salts in RSL and would not contradict this latest measurement. Or is could be something else. I suspect it will be a long time before there is consensus on RSL.
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Julius
post Aug 29 2016, 08:12 PM
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A study published discussing inverted river channels in Arabia terra as a sign of a warm and wet climate on early Mars talks about ancient river channels flowing from topographic highs to lower regions from south to the lower northern regions. My question is where would meridiani planum fit along this topographic gradient? The rocks stu died by opportunity rover were mainly sulphate rocks suggestive of acidic water alteration . The inverted channels discussed seem to originate on early mars where water would be expected to form different rock types from those observed by opportunity! Maybe I am getting the ages wrong. Correct me if I am wrong.
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