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Geomorphological Observations and Physical Hypotheses About Martian Dune Gullies

Nardi, Adriano; Piersanti, Antonio

We propose the hypothesis that dune gullies and seasonal "meteorological" appearances observed on the same dunes (e.g., frosting) may have a common origin. These gullies are difficult to explain through the action of liquid flow. The occurrence of a spring flowing from the crest of a dune seems impossible to explain. However, these phenomena could…