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Local late Amazonian boulder breakdown and denudation rate on Mars

De Haas, T. and Hauber, Ernst and Kleinhans, M. (2013) Local late Amazonian boulder breakdown and denudation rate on Mars. Geophysical Research Letters, 40 (14), pp. 3527-3531. Wiley. DOI: 10.1002/grl.50726 ISSN 0094-8276

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/grl.50726/abstract

Abstract

Inactive fan surfaces become smoother and develop desert pavement over time by weathering and erosion. We use this mechanism to estimate late Amazonian boulder breakdown and surface denudation rates on a young (�~1.25 Ma) (Schon et al., 2009) fan on Mars. This is done by comparing boulder size and surface relief between lobes of different ages. The boulder breakdown rate is 3.5 m/Myr, surface smoothing (denudation) rate is approximated as 0.89 m/Myr. These rates exceed previous estimates for the Amazonian by orders of magnitude. We attribute this to locality, high initial smoothing rates after morphological activity and obliquity and eccentricity-driven variation in the availability of (metastable) liquid water, which acts as a catalyst for weathering during these periods. The results have major implications for process interpretation of Martian landforms, as they imply that typical small-scale morphology may be subdued within <1 Myr

Item URL in elib:https://elib.dlr.de/83962/
Document Type:Article
Title:Local late Amazonian boulder breakdown and denudation rate on Mars
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
De Haas, T.Faculty of Geosciences, Universiteit Utrecht, Netherlands,UNSPECIFIED
Hauber, Ernsternst.hauber (at) dlr.deUNSPECIFIED
Kleinhans, M.Faculty of Geosciences, Utrecht University, Utrecht, The NetherlandsUNSPECIFIED
Date:2013
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:40
DOI :10.1002/grl.50726
Page Range:pp. 3527-3531
Publisher:Wiley
ISSN:0094-8276
Status:Published
Keywords:Mars, weathering, erosion, water, ice, climate, age, chronology
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt MARS-EXPRESS / HRSC
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Hauber, Ernst
Deposited On:28 Aug 2013 08:53
Last Modified:12 Dec 2013 22:10

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