Gully Formation and Climate Change in the Canadian Arctic: a Possible Analogue of Near-rim, Impact-crater Gullies in Utopia and Western Elysium

Content Provider	Semantic Scholar
Author	Soare, Richard J. Osinski, Gordon R.
Copyright Year	2008
Abstract	Introduction: The origin and development of Martian gullies remains a controversial topic within the planetary science community. Formation hypotheses are diverse. In earlier work [1], we hypothesised that the recent formation of some near-rim impactcrater gullies (Fig. 1) in Utopia and western Elysium Planitia was related to obliquity-driven rises in lateAmazonian mean temperatures and to the localised thawing of near-surface ice-rich regolith or permafrost (permafrost whose pore space is taken up if not exceeded by the presence of frozen water), perhaps even massive ice beds, that were emplaced during earlier obliquity cycles [2]. Possible geological markers of this ice-rich permafrost are lobate (alas-like) depressions [3-5], pingo-like mounds [6-8] and small-sized polygonal patterned-ground [3,9], all of which are ubiquitous in the region.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://www.lpi.usra.edu/meetings/lpsc2008/pdf/1318.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article