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| SEDIMENTARY GEOLOGY AT MERIDIANI PLANUM, MARS
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S.W. Squyres, Cornell University, Ithaca, NY, USA
Andrew Knoll, Harvard University, Cambridge, MA, USA
Description
In January of 2004, twin robotic explorers, Spirit and Opportunity, landed on Mars. Expected to last for 90 days, the
two rovers explored the Martian surface for nearly two years. Their objective was to search for evidence of ancient water on Mars, and
to determine if Mars ever had conditions that would have been suitable for life.
Opportunity, landed on Meridiani Planum, a
smooth plateau near the Martian equator, coming to rest in a small impact feature named Eagle Crater. After leaving Eagle Crater, Opportunity
drove eastward to Endurance Crater, a much larger carter that allowed access to deeper and older rocks.
At these locations, Opportunity,
found strong evidence for ancient water on Mars. This evidence includes ?blueberries,? small concretions rich in hematite that precipitated
from water. Other evidence includes rocks that ware made largely of sulphate salts, deposited when water evaporated, and rocks that preserve
ancient ripples that formed billions of years ago as water flowed over sand on Mars. The conditions long ago at Meridiani Planum could
have been suitable for some simple forms of life. Whether life could have developed there, however, is a more difficult question.
Audience
sedimentary geologists
Contents
1. Sedimentary Rocks at Meridiani Planum: Origin, diagenesis, and implications for life on Mars (S.W. Squyres, A.H. Knoll)
2. Stratigraphy
and Sedimentology of a Dry to Wet Eolian Depositional System, Burns Formation, Meridiani Planum, Mars (J.P. Grotzinger, R.E. Arvidson,
et al.)
3. Chemistry and Mineralogy of Outcrops at Meridiani Planum (B.C. Clark, R.V. Morris, et al.)
4. Provenance and Diagenesis of
the Evaporite-Bearing Burns Formation, Meridiani Planum, Mars (S.M. McLennan, J.F. Bell III, et al.)
5. Geochemical Modeling of Evaporation
Processes on Mars: Insight from the sedimentary record at Meridiani Planum (N.J. Tosca, S.M. McLennan, et al.)
6. The Rio Tinto Basin,
Spain: Mineralogy, sedimentary geobiology, and implications for interpretation of outcrop rocks at Meridiani Planum, Mars (D. Fernandez-Remolar,
R.V. Morris, et al.)
7. Hematite Spherules in Basaltic Tephra Altered Under Aqueous, Acid-Sulfate Conditions on Mauna Kea Volcano, Hawaii:
Possible clues for the occurrence of hematite-rich spherules in the Burns formation at Meridiani Planum, Mars (R.V. Morris, D.W. Ming,
et al.)
8. An Astrobiological Perspective on Meridiani Planum (A.H. Knoll, M. Carr, et al.)
| Bibliographic details |
Hardbound, 189 pages, publication date: DEC-2005
ISBN-13: 978-0-444-52250-4
ISBN-10: 0-444-52250-6
Imprint: ELSEVIER
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Last update: 5 Sep 2009
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