NASA’s Perseverance rover has uncovered the most definitive signs yet of an ancient Martian shoreline. Led by researchers at Imperial College London, the study describes how an area known as the Margin unit shows clear geological evidence of both subsurface water activity and shoreline processes. Jezero Crater’s western delta and ancient channels, tracing Mars’ long water history. Unmistakable Traces Of A Martian ShorelineIn lower areas of the Margin unit, researchers found layered sandstone embedded with rounded grains of olivine and carbonate, matching structures typically formed by wave action at a shoreline. According to Jones, the waves from the Jezero lake reshaped local volcanic rock, rounding particles and depositing them into a sandy layer.