Magnarini, G;
Mitchell, TM;
Grindrod, PM;
Schmitt, HH;
Petro, NE;
(2021)
Scaling relationship between the wavelength of longitudinal ridges and the thickness of long runout landslides on the moon.
Journal of Geophysical Research: Planets
, 126
(10)
, Article e2021JE006922. 10.1029/2021je006922.
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Abstract
The formation mechanism of longitudinal ridges in long runout landslides has been proposed to require ice and/or clay minerals, as low friction materials would allow the spreading of the deposit, causing the development of longitudinal ridges by tensile deformation of the slide. The necessity of ice in the formation of longitudinal ridges has been challenged by the finding that the wavelength of longitudinal ridges is 2 to 3 times the thickness of the deposit in both ice-free laboratory experiments on rapid granular flows and in a martian and terrestrial long runout landslide, suggesting a scale- and environment-independent mechanism. We conduct morphometric analysis of the longitudinal ridges in two landslides on the Moon, considered ice-free throughout its geological history: the Tsiolkovskiy crater landslide; and the Light Mantle avalanche in Taurus-Littrow Valley. We show that Tsiolkovskiy crater landslide exhibits a scaling relationship between the wavelength of its longitudinal ridges and the thickness of its deposit that is consistent with previous studies, supporting the idea that ice is not a necessary condition for the development of longitudinal ridges. As the Tsiolkovskiy crater landslide is laterally confined, it demonstrates that neither the development of longitudinal ridges nor the occurrence of the scaling relationship between the wavelength of the ridges and the thickness of the deposit depend on the lateral spreading of the deposit. Finally, we use the Light Mantle to test the use of the scaling relationship as a tool to estimate the thickness of the deposit when classical geomorphological methods are not applicable.
| Type: | Article |
|---|---|
| Title: | Scaling relationship between the wavelength of longitudinal ridges and the thickness of long runout landslides on the moon |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1029/2021je006922 |
| Publisher version: | https://doi.org/10.1029/2021JE006922 |
| Language: | English |
| Additional information: | © 2021. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
| Keywords: | long runout landslides, longitudinal ridges, Moon |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10136655 |
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