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Delineation of alluvial fans from Digital Elevation Models with a GIS algorithm for the geomorphological mapping of the Earth and Mars

Norini, Gianluca; Zuluaga, Maria Clara; Ortiz, Iris Jill +2 more

Alluvial fans are prominent depositional geomorphic features present in nearly all global climates on Earth, and also found on Mars. In this study, we present a Geographic Information System (GIS) algorithm designed for the semi-automated detection of alluvial fans that are connected to their contributing upstream drainage network, from the analys…

Mechanical conditions and modes of paraglacial deep-seated gravitational spreading in Valles Marineris, Mars

Mège, Daniel; Makowska, Magdalena; Gueydan, Frédéric +1 more

Deep-seated gravitational spreading (DSGS) affects the slopes of formerly glaciated mountain ridges. On Mars, DSGS has played a key role in shaping the landforms of the giant Valles Marineris troughs. Though less spectacular, DSGS is common in terrestrial orogens, where understanding its mechanics is critical in the light of the ongoing climate ch…

Analysis of crater valleys, Noachis Terra, Mars: Evidence of fluvial and glacial processes

Hobbs, S. W.; Paull, D. J.; Clarke, J. D. A.

The precise mechanism for the formation and evolution of crater valley networks in the Martian southern highlands remains under debate, with precipitation, groundwater flow, and melting induced by impact being suggested. We studied valley networks within four craters of the Noachis Terra highlands that were representative of similar features in No…