Observations of periglacial landforms in Utopia Planitia with the High Resolution Imaging Science Experiment (HiRISE)
Article first published online: 1 APR 2009
Copyright 2009 by the American Geophysical Union.
Journal of Geophysical Research: Planets (1991–2012)
Volume 114, Issue E4, April 2009
How to Cite
2009), Observations of periglacial landforms in Utopia Planitia with the High Resolution Imaging Science Experiment (HiRISE), J. Geophys. Res., 114, E04005, doi:10.1029/2008JE003264., , , , , and (
- Issue published online: 1 APR 2009
- Article first published online: 1 APR 2009
- Manuscript Accepted: 8 JAN 2009
- Manuscript Revised: 5 DEC 2008
- Manuscript Received: 17 SEP 2008
- Utopia Planitia;
 The region of western Utopia Planitia (80–105°E, 40–55°N) displays several types of landforms similar to Earth periglacial features, including scallop-shaped depressions and networks of polygonal terrains. The scalloped depressions have been proposed to originate from thermokarstic processes such as sublimation and/or melting of near-surface ground ice. Using HiRISE imagery, we characterize these depressions and several associated, distinct polygon networks in unprecedented morphologic and topographic detail and investigate support for an ice-based degradation process. The scalloped depressions and interior polygons and ridges are found to evolve together, mainly influenced by sublimation, local proximity of ground ice to the surface, and obliquity variations.