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An Igneous Origin for Features of a Candidate Crater-Lake System in Western Memnonia, MarsThe association of channels, inner terraces, and delta-like features with Martian impact craters has previously been interpreted as evidence in favor of the past existence of crater lakes on Mars. However, examination of a candidate crater-lake system in western Memnonia suggests instead that its features may have formed through igneous processes involving the flow and ponding of lava. Accumulations of material in craters and other topographic lows throughout much of the study region have characteristics consistent with those of volcanic deposits, and terraces found along the inner flanks of some of these craters are interpreted as having formed through drainage or subsidence of volcanic materials. Channels previously identified as inlets and outlets of the crater-lake system are interpreted instead as volcanic rilles. These results challenge previous interpretations of terrace and channel features in the study region and suggest that candidate crater lakes located elsewhere should be reexamined.
Document ID
20080043029
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Leverington, D. W.
(Smithsonian Institution Washington, DC, United States)
Maxwell, T. A.
(Smithsonian Institution Washington, DC, United States)
Date Acquired
August 24, 2013
Publication Date
June 11, 2004
Publication Information
Publication: Journal of Geophysical Research
Publisher: American Geophysical Union
Volume: 109
ISSN: 0148-0227
Subject Category
Lunar And Planetary Science And Exploration
Funding Number(s)
CONTRACT_GRANT: NAG5-13300
Distribution Limits
Public
Copyright
Other

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