Formation of gullies on Mars: link to recent climate history and insolation microenvironments implicate surface water flow origin.

Gully Formation on Mars: Testing the Snowpack Hypothesis from Analysis of Analogs in the Antarctic Dry Valleys

Introduction: Gullies, a class of unusually young features on Mars consisting of an alcove, a channel and a fan, were initially interpreted to have originated through processes related to the presence of liquid water, primarily through groundwater discharge [1,2]; the current metastability of liquid water on the surface of Mars generated a host of alternative explanations for the gullies [see s...

Formation of Gulllies on Mars: Link to Recent Climate History Implicates Surface Water Flow Origin

The formation and evolution of youthful gullies on Mars: Gullies as the late-stage phase of Mars’ most recent ice age

0019-1035/$ see front matter Published by Elsevier doi:10.1016/j.icarus.2009.06.018 * Corresponding author. E-mail address: [email protected] (J.L. Dickson) Gullies are extremely young erosional/depositional systems on Mars that have been carved by an agent that was likely to have been comprised in part by liquid water [Malin, M.C., Edgett, K.S., 2000. Evidence for recent groundwater seepage a...

Gully Formation on Mars and Earth: the Transition from Glacial Activity to Gully Depositional Phases

Introduction: The discovery of gullies on Mars [1,2] resulted in a wide variety of proposed candidate mechanisms for formation but ensuing analyses have shown very strong latitude and orientation dependencies on their distributions [3-6]. These constraints have been interpreted to require: 1) a volatile on or near the surface as a source of liquid water, and 2) insolation and slope orientation ...

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 ...