Orbiter finds Martian rock holding a rhythmic record

Via Spaceflightnow:

Rhythmic bedding in sedimentary bedrock within Becquerel crater on Mars is suggested by the patterns in this image from NASA's Mars Reconnaissance Orbiter. Credit: NASA/JPL-Caltech/University of Arizona

PASADENA, Calif. -- Climate cycles persisting for millions of years on ancient Mars left a record of rhythmic patterns in thick stacks of sedimentary rock layers, revealed in three-dimensional detail by a telescopic camera on NASA's Mars Reconnaissance Orbiter.
Researchers using the High Resolution Imaging Science Experiment camera report the first measurement of a periodic signal in the rocks of Mars. This pushes climate-cycle fingerprints much earlier in Mars' history than more recent rhythms seen in Martian ice layers. It also may rekindle debates about some patterns of rock layering on Earth.

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