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These Martian landforms were created when volcanic ash was modified by water to various degrees over millennia. These layered deposits are on a plateau near Juventae Chasma in the Valles Marineris region of Mars. Researchers have found that these bright layered deposits contain opaline silica and iron sulfates, which hint at their origins. Image credit: NASA/JPL-Caltech/University of Arizona

Astrogeology, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Lava / magma ocean / Volcanic Worlds, Mapping, Geodesy, Cartography, Bathymetry, Mars, Press Release

How Ash and Water Intricately Sculpted the Surface of Mars

by Keith CowingMarch 12, 2025

The plateaus that flank the largest canyon in the Solar System are shrouded in hypnotically complex landforms called light-toned layered deposits. Fifteen years ago, PSI Senior Scientist Catherine Weitz first […]

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How Ash and Water Intricately Sculpted the Surface of Mars

A Mars Impact Crater Surrounded By Chunks Of Water Ice

Gaia DR3 Limits on Stellar Engine Technosignatures in Nearby Stars

Catalytic Formation of H2 On Carbonaceous Dust Grains – Implications For Interstellar Observations

A High-Resolution Spectroscopic Survey of Directly Imaged Companion Hosts: III. Characterization of the Cold Imaged Planet Hosts AF Lep A and ε Indi A

The Viability of Life in Helium-Dominated Exoplanet Atmospheres