| Abstract: | The region of western Utopia Planitia (80-105 degreesE, 40-55 degrees 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. |
| Genre: | Article |
| ProdID: | 70003651 |
| Citation Author: | Lefort, A. ; Russell, P. S.; Thomas, N. ; McEwen, A. S.; Dundas, C. M.; Kirk, R. L. |
| Citation Contributing Office: | Astrogeology Science Center |
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| Citation End Page: | E04005 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Geophysical Research |
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| Citation Phsyical Description: | 18 p. |
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| Citation Publisher: | American Geophysical Union |
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| Citation Search Results Text: | Observations of periglacial landforms in Utopia Planitia with the High Resolution Imaging Science Experiment (HiRISE); 2009; Article; Journal; Journal of Geophysical Research; Lefort, A. ; Russell, P. S.; Thomas, N. ; McEwen, A. S.; Dundas, C. M.; Kirk, R. L. |
| Citation Start Page: | E04005 |
| Citation Volume: | 114 |
| Citation Year: | 2009 |
| Type: | citation/reference |
| Text: | Observations of periglacial landforms in Utopia Planitia with the High Resolution Imaging Science Experiment (HiRISE); 2009; Article; Journal; Journal of Geophysical Research; Lefort, A. ; Russell, P. S.; Thomas, N. ; McEwen, A. S.; Dundas, C. M.; Kirk, R. L. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (INDEX PAGE): | http://www.agu.org/journals/ABS/2009/2008JE003264.shtml |
| Date Other: | Wed, 3 Aug 2011 00:00 -0500 |
| Publisher: | American Geophysical Union |
