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Explanation: Fresh evidence of an ancient stream has been found on Mars. The robotic rover Curiosity has run across unusual surface features that carry a strong resemblance to stream banks on Earth. Visible in the above image, for example, is a small overhanging rock ledge that was quite possibly created by water erosion beneath. The texture of the ledge appears to be a sedimentary conglomerate, the dried remains of many smaller rocks stuck together. Beneath the ledge are numerous small pebbles, possibly made smooth by tumbling in and around the once-flowing stream. Pebbles in the streambed likely fell there as the bank eroded. Circled at the upper right is a larger rock possibly also made smooth by stream erosion. Curiosity has now discovered several indications of dried streambeds on Mars on its way to its present location where it will be exploring the unusual conjunction of three different types of landscape.
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NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Based on Astronomy Picture
Of the Day
Publications with keywords: Mars - water
Publications with words: Mars - water
See also:
- APOD: 2025 April 13 Б An Unusual Hole in Mars
- APOD: 2025 March 23 Б Ancient Ogunquit Beach on Mars
- SuperCam Target on Maaz
- Full Moon, Full Mars
- APOD: 2025 January 15 Б Wolf Moon Engulfs Mars
- APOD: 2024 December 3 Б Ice Clouds over a Red Planet
- APOD: 2024 November 10 Б Valles Marineris: The Grand Canyon of Mars