USGS Astrogeology: Research: Publications: Science Magazine

Merge of MI and 13-filter Pancam images of typical Meridiani Planum ripple

Soils of Eagle Crater and Meridiani Planum at the Opportunity Rover Landing Site

Issue Date: 12/03/2004
Volume: 306
Page: 1723
Abstract | Full Text of the Paper

Left: Merge of MI and 13-filter Pancam images of the inter-ripple trough of a typical Meridiani Planum ripple.

Summary

The soils at the Opportunity site are fine-grained basaltic sands mixed with dust and sulfate-rich outcrop debris. Hematite is concentrated in spherules eroded from the strata. Ongoing saltation exhumes the spherules and their fragments, concentrating them at the surface. Spherules emerge from soils coated, perhaps from subsurface cementation, by salts. Two types of vesicular clasts may represent basaltic sand sources. Eolian ripples, armored by well-sorted hematite-rich grains, pervade Meridiani Planum. The thickness of the soil on the plain is estimated to be about a meter. The flatness and thin cover suggest that the plain may represent the original sedimentary surface.

Authors

L. A. Soderblom, R. C. Anderson, R. E. Arvidson, J. F. Bell, III, N. A. Cabrol, W. Calvin, P. R. Christensen, B. C. Clark, T. Economou, B. L. Ehlmann, W. H. Farrand, D. Fike, R. Gellert, T. D. Glotch, M. P. Golombek, R. Greeley, J. P. Grotzinger, K. E. Herkenhoff, D. J. Jerolmack, J. R. Johnson, B. Jolliff, G. Klingelhöfer, A. H. Knoll, Z. A. Learner, R. Li, M. C. Malin, S. M. McLennan, H. Y. McSween, D. W. Ming, R. V. Morris, J. W. Rice, Jr., L. Richter, R. Rieder, D. Rodionov, C. Schröder, F. P. Seelos, IV, J. M. Soderblom, S. W. Squyres, R. Sullivan, W. A. Watters, C. M. Weitz, M. B. Wyatt, A. Yen, and J. Zipfel

Additional Information

For additional information, please contact Larry Soderblom.

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