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Originally published in Science Express on 13 November 2003
Science 12 December 2003:
Vol. 302. no. 5652, pp. 1931 - 1934
DOI: 10.1126/science.1090544
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Research Articles

Evidence for Persistent Flow and Aqueous Sedimentation on Early Mars

Michael C. Malin* and Kenneth S. Edgett

Landforms representative of sedimentary processes and environments that occurred early in martian history have been recognized in Mars Global Surveyor Mars Orbiter Camera and Mars Odyssey Thermal Emission Imaging System images. Evidence of distributary, channelized flow (in particular, flow that lasted long enough to foster meandering) and the resulting deposition of a fan-shaped apron of debris indicate persistent flow conditions and formation of at least some large intracrater layered sedimentary sequences within fluvial, and potentially lacustrine, environments.

Malin Space Science Systems, Post Office Box 910148, San Diego, CA 92191, USA.

* To whom correspondence should be addressed.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)