Astronomy and Space

Groundwater on Mars

Rain and snow were regular occurrences on Mars in the past; especially in the Noachian and early Hesperian epochs. Water was theorized to seep into the ground until it reached a formation that would not allow it to penetrate further (such a layer is called an aquitard and is believed to be impermeable). Water then accumulated forming a saturated layer. Deep aquifers may still exist.

Also on this shelf

See also

• ▸Hiten (spacecraft)
• ▸Armourer
• ▸Eta Aquilae

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