The Origin and Evolution of Oriented-network Polygonally Patterned Ground; the Antarctic Dry Valleys as Mars Analogue

Geologically recent gully–polygon relationships on Mars: Insights from the Antarctic Dry Valleys on the roles of permafrost, microclimates, and water sources for surface flow

a r t i c l e i n f o a b s t r a c t We describe the morphology and spatial relationships between composite-wedge polygons and Mars-like gullies (consisting of alcoves, channels, and fans) in the hyper-arid Antarctic Dry Valleys (ADV), as a basis for understanding possible origins for martian gullies that also occur in association with polygonally patterned ground. Gullies in the ADV arise in ...

Distribution, Origin, Stability and Habitability of Ground Ice in University Valley, Dry Valleys of Antarctica: Analogue to Ground Ice Conditions on Mars

VALLEY, DRY VALLEYS OF ANTARCTICA: ANALOGUE TO GROUND ICE CONDITIONS ON MARS. D. Lacelle, A. Davila, B., Faucher, D. Fisher, A. Jackson, C. Lapalme, W. Pollard, C.P. McKay. Department of Geography, University of Ottawa, Ottawa, Canada ([email protected]), Department of Geography, McGill Univrersity, Montreal, Canada, SETI Institute, Mountain View, USA; Department of Earth Sciences, University...

Thermal Contraction Crack Polygons on Mars: Classification, Distribution, and Con- Text for Phoenix from North and South Polar Hirise Observations

Introduction: The detection of subsurface ice at the po-lygonally-patterned Phoenix landing site [1] is the culmination of over thirty years of Mars permafrost and polygons research [2-6]. The exploration of martian polygonally pat-terned ground addresses several critical questions related to recent martian habitability and climate processes: 1) what is the origin of ice in the shallow martian ...

Late-stage Gully Modification on Mars: Polygonally-patterned Ground, Permafrost, and Gully Water Sources

Thermal contraction crack polygons on Mars: Classification, distribution, and climate implications from HiRISE observations

[1] Documenting the morphology and distribution of polygonally patterned ground on Mars is critical for understanding the age and origin of the Martian latitude-dependent mantle. Polygonally patterned ground on Mars is analyzed using High Resolution Imaging Science Experiment image data in order to document the variation of polygon morphology within latitude bands 30–80 in both northern and sou...