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Geomorphic evidence for former lobate debris aprons at low latitudes on Mars: Indicators of the Martian paleoclimate

Hauber, Ernst and van Gasselt, Stephan and Chapman, Mary and Neukum, Gerhard (2008) Geomorphic evidence for former lobate debris aprons at low latitudes on Mars: Indicators of the Martian paleoclimate. Journal of Geophysical Research, 113 (E2), E02007. American Geophysical Union. DOI: 10.1029/2007JE002897

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Official URL: http://www.agu.org/pubs/crossref/2008/2007JE002897.shtml

Abstract

Circumferential depressions enclosing mesas and plateaus in the northern Kasei Valles and in the Tartarus Colles regions of Mars are interpreted as indicators of the former extent of lobate debris aprons, thought to be mixtures of ice and clastic particles. These former lobate debris aprons existed about 1 Ga ago and were embayed by lavas or other flow deposits. After the lobate debris aprons had been removed by sublimation and deflation, topographic depressions with a depth of 50 m and a width of several kilometers were left behind between the mesa or plateau scarp and the solidified flow materials. These depressions or moats are located equatorward of ±30° at significantly lower latitudes than generally observed for occurrences of modern, intact lobate debris aprons. This observation provides evidence that the paleoclimate at that time was different than today, probably due to a higher averaged obliquity of the planet's rotational axis.

Item URL in elib:https://elib.dlr.de/55832/
Document Type:Article
Title:Geomorphic evidence for former lobate debris aprons at low latitudes on Mars: Indicators of the Martian paleoclimate
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hauber, ErnstUNSPECIFIEDUNSPECIFIED
van Gasselt, StephanFU BerlinUNSPECIFIED
Chapman, MaryUSGS FlagstaffUNSPECIFIED
Neukum, GerhardFU BerlinUNSPECIFIED
Date:February 2008
Journal or Publication Title:Journal of Geophysical Research
Open Access:No
In DOAJ:No
In SCOPUS:No
In ISI Web of Science:No
Volume:113
DOI :10.1029/2007JE002897
Page Range:E02007
Publisher:American Geophysical Union
Status:Published
Keywords:Mars, Water, Ice, Climate
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 > Planetary Geology
Deposited By: Hauber, Ernst
Deposited On:25 Nov 2008
Last Modified:12 Dec 2013 20:33

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