![(A) Sampling location at the origin of Río Tinto, Spain (modified from García-Moyano et al., 2007). (B) The iron microbialites (white arrow) grew horizontally on a northeast-facing wall. (C) -- [GSA Bulletin]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/Iron-microbialites.png?resize=1200%2C720&ssl=1)
[GSA Bulletin] The search for life on Mars requires identifying suitable biosignatures detectable by rover missions or in returned samples. To support the progressing astrobiological exploration of Mars, we investigated […]
Meridiani Planum
Posted inAstrogeology, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Mars, Status Report
Martian Concretion Sizes Predicted From Two Independently Constrained Inputs: Atmospheric Dust Grain Size And Obliquity-forced Wetting Duration
Diagenetic concretions have been identified at multiple widely separated sites on Mars, including Meridiani Planum (Opportunity), Gale crater (Curiosity), and Jezero crater (Perseverance).
Posted inAstrogeology, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Fossils & Paleontology, Imaging & Spectroscopy, Mapping, Geodesy, Cartography, Bathymetry, Mars, Press Release
Mars Perseverance Examines A Rock With Hundreds Of Millimeter-sized Spheres
Last week the Perseverance Science Team were astonished by a strange rock comprised of hundreds of millimeter-sized spheres and the team are now working hard to understand their origin.
Posted inAstrogeology, Icy Worlds, Mars, Status Report
Aeolian Dune Sediment Flux Heterogeneity in Meridiani Planum, Mars
It is now known unambiguously that wind-driven bedform activity is occurring on the surface of Mars today, including early detections of active sand dunes in Meridiani Planum’s Endeavour crater.