Outwash plains and thermokarst on Mars
Icarus
By: F.M. Costard and J.S. Kargel
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Abstract
The spatial distribution of different types of rampart craters on Mars suggests a hemispheric asymmetry in the distribution of ground ice. The northern plains, especially major topographic depressions near the terminations of outflow channels, have high percentages of rampart craters. Two of these basins, Acidalia and Utopia Planitiae, received extraordinarily large amounts of water and sediment from the Chryse and Elysium outflow channels. In both regions, the analysis of high-resolution Viking pictures (12 m/pixel) indicates a concentration of kilometer-scale depressions that are similar in size and form to thermokarstic features in Yakutia (Siberia) and parts of the arctic coastal plain of North America. Accordingly, we infer that (1) Utopia Planitia and Acidalia Planitia may contain thick, laterally continuous, ice-rich sedimentary deposits related to outflow channel-forming floods, and (2) these areas of Mars may have experienced thermokarstic processes similar to modern thermokarstic processes in some periglacial regions of Earth.
Suggested Citation
Costard, F., Kargel, J., 1995, Outwash plains and thermokarst on Mars: Icarus, v. 114, no. 1, p. 93-112, https://doi.org/10.1006/icar.1995.1046.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Outwash plains and thermokarst on Mars |
| Series title | Icarus |
| DOI | 10.1006/icar.1995.1046 |
| Volume | 114 |
| Issue | 1 |
| Year Published | 1995 |
| Language | English |
| Publisher | Elsevier |
| Description | 20 p. |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Icarus |
| First page | 93 |
| Last page | 112 |
| Other Geospatial | Mars |