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Morphologic, stratigraphic and morphometric investigations of valley networks in eastern Libya Montes, Mars: Implications for the Noachian/Hesperian climate change

Erkeling, G. and Reiss, D. and Hiesinger, H. and Jaumann, R. (2010) Morphologic, stratigraphic and morphometric investigations of valley networks in eastern Libya Montes, Mars: Implications for the Noachian/Hesperian climate change. Earth and Planetary Science Letters, 294, pp. 291-305. Elsevier. DOI: 10.1016/j.epsl.2009.08.008

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Abstract

“Dendritic valley networks” and broad “longitudinal valleys” are widespread within the eastern Libya Montes region. The morphologic characteristics of the studied dendritic valleys, especially their occurrence at local summits, provide evidence for the initial formation by surface runoff due to atmospheric precipitation whereas the longitudinal valley systems are thought to have been formed and modified by groundwater-induced processes. Our crater counts and model ages show, that the dendritic valley networks (average age not, vert, similar 4.0 Ga) formed earlier than the longitudinal valley systems (average age not, vert, similar 3.7 Ga). Both fluvial forms indicate a temporal change of the erosive environment at the Noachian/Hesperian transition at not, vert, similar 3.8 Ga. Our results suggest that the fluvial activity within our investigation area lasted for not, vert, similar 800 My, from not, vert, similar 4.1 Ga to not, vert, similar 3.3 Ga. The dendritic valleys show valley densities between 0.12 km− 1 and 0.57 km− 1, indicative of highly mature and integrated valley systems that we interpret to be characteristic of warmer and wetter conditions on Mars.

Item URL in elib:https://elib.dlr.de/61577/
Document Type:Article
Title:Morphologic, stratigraphic and morphometric investigations of valley networks in eastern Libya Montes, Mars: Implications for the Noachian/Hesperian climate change
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Erkeling, G.Universität Münster, Institut für Planetologie, Wilhelm-Klemm-Straße 10, 48149 Münster, GermanyUNSPECIFIED
Reiss, D.Universität Münster, Institut für Planetologie, Wilhelm-Klemm-Straße 10, 48149 Münster, GermanyUNSPECIFIED
Hiesinger, H.Universität Münster, Institut für Planetologie, Wilhelm-Klemm-Straße 10, 48149 Münster, GermanyUNSPECIFIED
Jaumann, R.ralf.jaumann (at) dlr.deUNSPECIFIED
Date:2010
Journal or Publication Title:Earth and Planetary Science Letters
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:294
DOI :10.1016/j.epsl.2009.08.008
Page Range:pp. 291-305
Publisher:Elsevier
Status:Published
Keywords:Mars; Libya Montes; dendritic; longitudinal; valley networks; fluvial activity; valley density
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Projekt MARS-EXPRESS / HRSC (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research
Deposited By: Pieth, Susanne
Deposited On:09 Dec 2009 14:13
Last Modified:26 Mar 2013 13:14

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