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In situ evidence for an ancient aqueous environment at Meridiani Planum, Mars

Science

By:
, , , , , , , , , , , , , , , , , ,
DOI: 10.1126/science.1104559

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Abstract

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 chemical and siliciclastic sediments with a complex diagenetic history. The environmental conditions that they record include episodic inundation by shallow surface water, evaporation, and desiccation. The geologic record at Meridiani Planum suggests that conditions were suitable for biological activity for a period of time in martian history.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
In situ evidence for an ancient aqueous environment at Meridiani Planum, Mars
Series title:
Science
DOI:
10.1126/science.1104559
Volume
306
Issue:
5702
Year Published:
2004
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
1709
Last page:
1714
Number of Pages:
6