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

Squyres, S. W. and Grotzinger, J. P. and Arvidson, R. E. and Bell, J. F., III and Calvin, W. and Christensen, P. R. and Clark, B. C. and Crisp, J. A. and Farrand, W. H. and Herkenhoff, K. E. and Johnson, J. R. and Klingelhöfer, G. and Knoll, A. H. and McLennan, S. M. and McSween, Harry Y., Jr. and Morris, R. V. and Rice, J. W., Jr. and Rieder, R. and Soderblom, L. A. (2004) In Situ Evidence for an Ancient Aqueous Environment at Meridiani Planum, Mars. Science, 306 (5702). pp. 1709-1714. ISSN 0036-8075. doi:10.1126/science.1104559.

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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.

Item Type:Article
Related URLs:
URLURL TypeDescription
Grotzinger, J. P.0000-0001-9324-1257
Arvidson, R. E.0000-0002-2854-0362
Bell, J. F., III0000-0002-2006-4074
Calvin, W.0000-0002-6097-9586
Christensen, P. R.0000-0001-9625-4723
Clark, B. C.0000-0002-5546-8757
Crisp, J. A.0000-0002-3202-4416
Herkenhoff, K. E.0000-0002-3153-6663
Johnson, J. R.0000-0002-5586-4901
Klingelhöfer, G.0000-0002-8612-6354
Knoll, A. H.0000-0003-1308-8585
McLennan, S. M.0000-0003-4259-7178
McSween, Harry Y., Jr.0000-0003-3749-7711
Morris, R. V.0000-0003-1413-4002
Soderblom, L. A.0000-0002-0917-853X
Additional Information:© 2004 American Association for the Advancement of Science. Received for publication 26 August 2004. Accepted for publication 19 October 2004. This research was carried out for the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA.
Group:Division of Geological and Planetary Sciences
Funding AgencyGrant Number
Issue or Number:5702
Record Number:CaltechAUTHORS:20130306-105158576
Persistent URL:
Official Citation:In situ evidence for an ancient aqueous environment at Meridiani Planum, Mars. Squyres SW, Grotzinger JP, Arvidson RE, Bell JF 3rd, Calvin W, Christensen PR, Clark BC, Crisp JA, Farrand WH, Herkenhoff KE, Johnson JR, Klingelhöfer G, Knoll AH, McLennan SM, McSween HY Jr, Morris RV, Rice JW Jr, Rieder R, Soderblom LA. Science. 2004 Dec 3;306(5702):1709-14.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:37340
Deposited By: Ruth Sustaita
Deposited On:06 Mar 2013 19:10
Last Modified:30 Nov 2022 17:52

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