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Fretted Terrain Valley
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Caption:
4 May 2005
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows the floor of a fretted terrain valley in the Coloe Fossae region. Valleys found at north middle latitudes, such as this one, often have odd linear features on them. When seen at much lower resolution by the Viking Orbiters in the late 1970s, investigators assumed that the linear features indicated flow of ice or ice-rich debris, as might occur in a glacier or rock glacier. MOC images show little evidence to support the notion that these materials flow; indeed, similar ridges occur in closed valleys, from which nothing can flow. This picture shows a close-up of one such closed valley.
Location near
: 35.3°N, 303.1°W
Image width
: ~3 km (~1.9 mi)
Illumination from
: lower left
Season
: Northern Summer
Cataloging Keywords:
| Name | Value | Additional Values |
|---|---|---|
| Target | Mars | |
| System | ||
| Target Type | Planet | |
| Mission | Mars Global Surveyor (MGS) | Viking |
| Instrument Host | Mars Global Surveyor | |
| Host Type | Orbiter | |
| Instrument | Mars Orbiter Camera (MOC) | |
| Detector | ||
| Extra Keywords | Grayscale | |
| Acquisition Date | ||
| Release Date | 2005-05-04 | |
| Date in Caption | 2005-05-04 | |
| Image Credit | NASA/JPL/Malin Space Science Systems | |
| Source | photojournal.jpl.nasa.gov/catalog/PIA07898 | |
| Identifier | PIA07898 | |
