POSSIBLE (VALLEY/CHANNEL) PINGOS & "WET-BASED" PERIGLACIATION AT THE MARS

R. J. Soare , Susan J. Conway (1) , J. P. Williams , R. M. El Maarry , G. Di Achille

1 LPG - Laboratoire de Planétologie et Géodynamique [UMR 6112]

Introduction: Mounds that exhibit similarities of shape, scale, features, and spatially-associated landforms with terrestrial pingos (perennially ice-cored mounds) [e.g. 1-2] (Fig. 1) have been observed at the mid-latitudes of Utopia Planitia [3-7] and the Argyre region [8], as well as the near-equatorial latitude of Athabasca Vallis [9-10]. Pingo formation on Earth largely follows one of two pathways: a) the precursive pooling of surface or near-surface water, its freeze-thaw cycling and permafrost aggradation (hydrostatic/closed-system pingos [CSPs]); or, b) groundwater migration driven or facilitated by topography, geological faulting or artesian pressure (hydraulic/open-system pingo [OSPs]) [1-2].

Domaines: Planétologie; Géomorphologie

R. J. Soare, Susan J. Conway, J. P. Williams, R. M. El Maarry, G. Di Achille. POSSIBLE (VALLEY/CHANNEL) PINGOS & "WET-BASED" PERIGLACIATION AT THE MARS. 51st Lunar and Planetary Science Conference, Mar 2020, The Woodlands, Houston, Texas, United States. ⟨hal-03091535⟩