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Possible Analogs for Small Valleys on Mars at the Haughton Impact Crater Site, Devon Island, Canadian High ArcticSmall valleys are perhaps the clearest evidence for an aqueous past on Mars. While small valley formation has occurred even in Amazonian times, most small valleys on Mars are associated with the heavily cratered Noachian terrains. Martian small valleys are often cited as evidence for a putative warmer and wetter climate on Early Mars in which rain and subsequent surface runoff would have acted as significant erosional agents, but the morphology of many small valleys has at the same time been recognized as having several unusual characteristics, making their origin still enigmatic and climatic inferences from them uncertain. Meanwhile, martian climate modeling efforts have been facing difficulties over the past decades with the problem of making the early martian climate warm enough to achieve temperature above 273 K to allow rainfall and the sustained flow of liquid water at the martian surface.
Document ID
20000092052
Acquisition Source
Ames Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Lee, P.
(NASA Ames Research Center Moffett Field, CA United States)
Rice, J. W., Jr.
(Arizona Univ. Tucson, AZ United States)
Bunch, Theodore E.
(NASA Ames Research Center Moffett Field, CA United States)
Grieve, R. A. F.
(Geological Survey of Canada Ottawa, Ontario Canada)
McKay, C. P.
(Arizona Univ. Tucson, AZ United States)
Schutt, J. W.
(Schutt (J. W.) United States)
Zent, A. P.
(NASA Ames Research Center Moffett Field, CA United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 1999
Subject Category
Lunar And Planetary Science And Exploration
Meeting Information
Meeting: Lunar and Planetary Science
Location: Houston, TX
Country: United States
Start Date: March 15, 1999
End Date: March 20, 1999
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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