Observations of periglacial landforms in utopia planitia with the high resolution imaging science experiment (HiRISE)

A. Lefort, P. S. Russell, N. Thomas, A. S. McEwen, C. M. Dundas, R. L. Kirk Physikalisches

Research output: Contribution to journalArticle

74 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article numberE04005
JournalJournal of Geophysical Research E: Planets
Volume114
Issue number4
DOIs
StatePublished - Apr 20 2009

ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

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