page_title: Groundwater on Mars
hierarchical_section_title: Groundwater on Mars
caption_attribution_description: English: Burns Cliff inside of Endurance Crater This image was downloaded off of NASA's website and has the same permissions as other images on this wiki topic (en:Opportunity rover). This image has been cropped and has had missing sky pixels filled in. The image is based on an approximate true-color mosaic based on multiple frames taken through color filters. The color is approximate because the red filter is actually an infrared filter, which is used more often than a true red filter by the rovers for its scientific value. The rovers do have a red filter, but due to the limits of data transmission from Mars, it is often not used. Some suggest that the actual sky color would have a bit more orange in it if a true red filter was used. Opportunity had a bit of difficulty reaching this spot due to the slope. Its recorded wheel movement indicated a high degree of slippage.
context_page_description: During past ages, there was rain and snow on Mars; especially in the Noachian and early Hesperian epochs. Some moisture entered the ground and formed aquifers. That is, the water went into the ground, seeped down until it reached a layer that would not allow it to penetrate, and then water piled up forming a layer that was saturated with water. Deep aquifers may still exist.
context_section_description: During past ages, there was rain and snow on Mars; especially in the Noachian and early Hesperian epochs.  Some moisture entered the ground and formed aquifers.  That is, the water went into the ground, seeped down until it reached a layer that would not allow it to penetrate (such a layer is called impermeable), and then water piled up forming a layer that was saturated with water. Deep aquifers may still exist.
caption: The preservation and cementation of aeolian dune stratigraphy in Burns Cliff in Endurance Crater are thought to have been controlled by flow of shallow groundwater.[1]
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