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Drainage basins and channel incision on Mars

Aharonson, Oded and Zuber, Maria T. and Rothman, Daniel H. and Schorghofer, Norbert and Whipple, Kelin X. (2002) Drainage basins and channel incision on Mars. Proceedings of the National Academy of Sciences of the United States of America, 99 (4). pp. 1780-1783. ISSN 0027-8424. PMCID PMC122270. doi:10.1073/pnas.261704198.

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Measurements acquired by the Mars Orbiter Laser Altimeter on board the Mars Global Surveyor indicate that large drainage systems on Mars have geomorphic characteristics inconsistent with prolonged erosion by surface runoff. We find the topography has not evolved to an expected equilibrium terrain form, even in areas where runoff incision has been previously interpreted. By analogy with terrestrial examples, groundwater sapping may have played an important role in the incision. Longitudinally flat floor segments may provide a direct indication of lithologic layers in the bedrock, altering subsurface hydrology. However, it is unlikely that floor levels are entirely due to inherited structures due to their planar cross-cutting relations. These conclusions are based on previously unavailable observations, including extensive piece-wise linear longitudinal profiles, frequent knickpoints, hanging valleys, and small basin concavity exponents.

Item Type:Article
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URLURL TypeDescription CentralArticle
Aharonson, Oded0000-0001-9930-2495
Whipple, Kelin X.0000-0002-8430-6925
Additional Information:© 2002 National Academy of Sciences. Received November 15, 2001; Accepted December 27, 2001. We acknowledge helpful reviews from Mike Carr and Vic Baker, and discussions with Roger Phillips, Rebecca Williams, Robert Craddock, and Noah Snyder. This study was supported by the generous Kerr Fellowship, the Mars Global Surveyor Project, and by Department of Energy Grant DE FG02-99ER 15004.
Funding AgencyGrant Number
Kerr FellowshipUNSPECIFIED
Department of Energy (DOE)DE-FG02-99ER15004
Issue or Number:4
PubMed Central ID:PMC122270
Record Number:CaltechAUTHORS:20130213-152605770
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:36904
Deposited By: Jason Perez
Deposited On:14 Feb 2013 15:12
Last Modified:09 Nov 2021 23:25

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