Origin of Longitudinal Ridges and Furrows in Long Runout Landslides: the Case Study of a Martian Landslide. Academic Article uri icon

abstract

  • The formation mechanism of long runout landslides remains matter of discussion as does, yet poorly investigated, the origin of longitudinal ridges and furrows observed on the surface of their deposits. We use high resolution images and stereo-derived DEMs to conduct detailed morphological and morphometric characterization of longitudinal ridges for one martian landslide in Coprates Chasma, Valles Marineris. The analysis reveals that, from proximal to distal areas of the deposit, 1) longitudinal ridges tend to diverge, 2) their number increases while 3) their amplitude and wavelength decreases. Careful observation provides evidence of such behaviour, showing new smaller ridges developing between diverging ridges. Additionally, we assess the ratio between the wavelength of ridges and the average thickness of the deposit at any given profiles. Finally, close-up inspection shows …

publication date

  • December 1, 2017