In Situ Evidence for an Ancient Aqueous Environment at Meridiani Planum, Mars

@article{Squyres2004InSE,
  title={In Situ Evidence for an Ancient Aqueous Environment at Meridiani Planum, Mars},
  author={S. Squyres and J. Grotzinger and R. Arvidson and J. Bell and W. Calvin and P. Christensen and B. Clark and J. Crisp and W. Farrand and K. Herkenhoff and J. Johnson and G. Klingelh{\"o}fer and A. Knoll and S. McLennan and H. Mcsween and R. Morris and J. W. Rice and R. Rieder and L. Soderblom},
  journal={Science},
  year={2004},
  volume={306},
  pages={1709 - 1714}
}
Sedimentary rocks at Eagle crater in Meridiani Planum are composed of fine-grained siliciclastic materials derived from weathering of basaltic rocks, sulfate minerals (including magnesium sulfate and jarosite) that constitute several tens of percent of the rock by weight, and hematite. Cross-stratification observed in rock outcrops indicates eolian and aqueous transport. Diagenetic features include hematite-rich concretions and crystal-mold vugs. We interpret the rocks to be a mixture of… Expand
Evidence for Water at Meridiani
The Mars Exploration Rover Opportunity has examined sedimentary structures in the Burns formation at Meridiani Planum. The materials in this formation reflect, in part, subaqueous deposition ofExpand
Sedimentary rocks at Meridiani Planum: Origin, diagenesis, and implications for life on Mars
The MER rover Opportunity has carried out the first outcrop-scale investigation of ancient sedimentary rocks on Mars. The rocks, exposed in craters and along fissures in Meridiani Planum, areExpand
Sedimentary textures formed by aqueous processes, Erebus crater, Meridiani Planum, Mars
New observations at Erebus crater (Olympia outcrop) by the Mars Exploration Rover Opportunity between sols 671 and 735 (a sol is a martian day) indicate that a diverse suite of primary andExpand
Aqueous environmental history of Mars revealed by mineralogy and geochemistry of outcrop exposures of sedimentary rocks
Recent high-resolution spectral images and in-situ observations have revealed more than 1000 outcrops of diverse aqueous mineral deposits on Mars. Layered deposits of phyllosilicates (and carbonates)Expand
Chemistry and mineralogy of outcrops at Meridiani Planum
Analyses of outcrops created by the impact craters Endurance, Fram and Eagle reveal the broad lateral continuity of chemical sediments at the Meridiani Planum exploration site on Mars. ApproximatelyExpand
Jarosite and Hematite at Meridiani Planum from Opportunity's Mössbauer Spectrometer
Mössbauer spectra measured by the Opportunity rover revealed four mineralogical components in Meridiani Planum at Eagle crater: jarosite- and hematite-rich outcrop, hematite-rich soil,Expand
A volcanic environment for bedrock diagenesis at Meridiani Planum on Mars
TLDR
An alternative model for diagenesis of Meridiani bedrock is proposed that involves deposition of volcanic ash followed by reaction with condensed sulphur dioxide- and water-bearing vapours emitted from fumaroles, which invokes an environment considerably less favourable for biological activity on Mars than previously proposed interpretations. Expand
Geochemical constraints on the presence of clay minerals in the Burns formation, Meridiani Planum, Mars
Abstract Burns formation sandstones, deposited by aeolian processes and preserved at Meridiani Planum, Mars, contain abundant sulfate minerals. These sedimentary rocks are thought to beExpand
Two Years at Meridiani Planum: Results from the Opportunity Rover
TLDR
Observations from microscopic to orbital scales indicate that ancient Meridiani once had abundant acidic groundwater, arid and oxidizing surface conditions, and occasional liquid flow on the surface. Expand
The Río Tinto Basin, Spain: Mineralogy, sedimentary geobiology, and implications for interpretation of outcrop rocks at Meridiani Planum, Mars
Abstract Exploration by the NASA rover Opportunity has revealed sulfate- and hematite-rich sedimentary rocks exposed in craters and other surface features of Meridiani Planum, Mars. Modern, Holocene,Expand
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Mössbauer spectra measured by the Opportunity rover revealed four mineralogical components in Meridiani Planum at Eagle crater: jarosite- and hematite-rich outcrop, hematite-rich soil,Expand
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TLDR
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