Skip to comments.Astronomy Picture of the Day -- An Ancient Stream Bank on Mars
Posted on 10/02/2012 3:33:37 AM PDT by SunkenCiv
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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IMHO -- Flowing water on Mars is and probably always has been a transient event, linked to impact. I'd also point out that these would be categorically tagged as wind erosion if they were found, say, on the Sphinx...
Uhh... that circled rock kinda looks like a pecker.
Naughty Naughty! :-)
Dave! I remember you from gym class!
Global WARMING caused by evil WHITE RICH REPUBLICANS!! /s
Is MARVIN the MARTIN driving around in a SUV on MARS??