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    Curiosity subsurface water flow beneath Martian dunes: geotechnical insights for engineers

    November 21, 2025|

    Reviewed by Tom Sullivan

    Curiosity subsurface water flow beneath Martian dunes: geotechnical insights for engineers

    First reported on Geoengineer.org – News

    30 Second Briefing

    Researchers at New York University Abu Dhabi report Curiosity rover evidence that liquid water once flowed beneath aeolian dunes in Gale Crater, forming cemented crusts and polygonal fracture networks in fine-grained sandstones. High-resolution Mastcam and ChemCam observations show cross-bedded units with indurated tops and moisture-related diagenetic features consistent with shallow subsurface flow rather than surface runoff. For planetary geotechnics, the work implies past groundwater-driven cementation, altered shear behaviour of dune-derived sediments, and more complex subsurface stratigraphy relevant to future drilling and in situ construction on Mars.

    Technical Brief

    • Researchers interpret multiple cement generations, implying episodic wetting–drying cycles in the shallow subsurface.
    • Study constrains water activity to post-depositional diagenesis, not contemporaneous with primary dune migration.
    • Findings inform Martian regolith mechanical models, particularly layered contrasts between indurated caps and weaker host sands.
    • Work is limited to Gale Crater outcrops along Curiosity’s traverse, with no in situ subsurface coring.
    • For future in situ construction, results suggest potential bearing-cap layers over weaker, more erodible dune-derived strata.

    Our Take

    Gale Crater is one of the few extra-terrestrial ‘sites’ that appears in our geotechnical coverage, and work like this from NYUAD is feeding directly into analogue models that some terrestrial dune and tailings researchers now use for seepage and liquefaction studies.

    Among the 66 tag-matched Projects/Research pieces, most geotechnical work focuses on Earth-based slopes, foundations and tailings, so Martian subsurface flow observations stand out as a testbed for extreme low-pressure, low-gravity conditions that can stress-check numerical groundwater and unsaturated flow codes used in mining and civil design.

    For practitioners, the inferred subsurface water pathways beneath dunes at Gale Crater provide rare, large-scale natural experiments that can inform how capillary barriers, perched water tables and preferential flow might behave in very dry, fine-grained covers over waste rock or tailings facilities.

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    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

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