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  • ScienceAdvances published EAS Professor Juergen Schieber's work on Mars

Wave Ripples on Mars

ScienceAdvances published a paper Co-authored by EAS Professor Juergen Schieber

Tuesday, January 28, 2025

Juergen Schieber

Quoting ScienceAdvances: "Wave ripples formed in ancient, ice-free lakes in Gale crater, Mars."

"Symmetrical wave ripples identified with NASA’s Curiosity rover in ancient lake deposits at Gale crater provide a key paleoclimate constraint for early Mars: At the time of ripple formation, climate conditions must have supported ice-free liquid water on the surface of Mars. These features are the most definitive examples of wave ripples on another planet. The ripples occur in two stratigraphic intervals within the orbitally defined Layered Sulfate Unit: a thin but laterally extensive unit at the base of the Amapari member of the Mirador formation, and a sandstone lens within the Contigo member of the Mirador formation. In both locations, the ripples have an average wavelength of ~4.5 centimeters. Internal laminae and ripple morphology show an architecture common in wave-influenced environments where wind-generated surface gravity waves mobilize bottom sediment in oscillatory flows. Their presence suggests formation in a shallow-water (<2 meters) setting that was open to the atmosphere, which requires atmospheric conditions that allow stable surface water."

Read the article in ScienceAdvances

 

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