|
Collection:
|
|
NASA Planetary Photo Journal Collection
Collection
NASA Planetary Photo Journal Collection
Collection
|
|
Title:
|
|
Fretted Terrain Valley in Coloe Fossae Region
Title
Fretted Terrain Valley in Coloe Fossae Region
Title
|
|
Original Caption Released with Image:
|
Figure 1 Click on image for larger version The image in figure 1 shows lineated valley fill in one of a series of enclosed, intersecting troughs known as Coloe (Choloe) Fossae. Lineated valley fill consists of rows of material in valley centers that are parallel to the valley walls. It is probably made of ice-rich material and boulders that are left behind when the ice-rich material sublimates. Very distinct rows can be seen near the south (bottom) wall of the valley. Lineated valley fill is thought to result from mass wasting (downslope movement) of ice-rich material from valley walls towards their centers. It is commonly found in valleys near the crustal dichotomy that separates the two hemispheres of Mars. The valley shown here joins four other valleys with lineated fill near the top left corner of this image. Their juncture is a topographic low, suggesting that the lineated valley fill from the different valleys may be flowing or creeping towards the low area (movement towards the upper left of the image). The valley walls appear smooth at first glance but are seen to be speckled with small craters several meters in diameter at HiRISE resolution (see contrast-enhanced subimage). This indicates that at least some of the wall material has been stable to mass wasting for some period of time. Also seen on the valley wall are elongated features shaped like teardrops. These are most likely slightly older craters that have been degraded due to potentially recent downhill creep. It is unknown whether the valley walls are shedding material today. The subimage is approximately 140 x 400 m (450 x 1280 ft). Image PSP_0 01372_2160 was taken by the High Resolution Imaging Science Experiment (HiRISE) camera onboard the Mars Reconnaissance Orbiter spacecraft on November 11, 2006. The complete image is centered at 35.5 degrees latitude, 56.8 degrees East longitude. The range to the target site was 290.3 km (181.4 miles). At this distance the image scale ranges from 58.1 cm/pixel (with 2 x 2 binning) to 116.2 cm/pixel (with 4 x 4 binning). This image has been map-projected to 50 cm/pixel and north is up. The image was taken at a local Mars time of 3:23 PM and the scene is illuminated from the west with a solar incidence angle of 48 degrees, thus the sun was about 42 degrees above the horizon. At a solar longitude of 133.8 degrees, the season on Mars is Northern Summer. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Mars Reconnaissance Orbiter for NASA's Science Mission Directorate, Washington. Lockheed Martin Space Systems, Denver, is the prime contractor for the project and built the spacecraft. The High Resolution Imaging Science Experiment is operated by the University of Arizona, Tucson, and the instrument was built by Ball Aerospace and Technology Corp., Boulder, Colo.
Original_Caption_Rel eased_with_Image
Figure 1 Click on image for larger version The image in figure 1 shows lineated valley fill in one of a series of enclosed, intersecting troughs known as Coloe (Choloe) Fossae. Lineated valley fill consists of rows of material in valley centers that are parallel to the valley walls. It is probably made of ice-rich material and boulders that are left behind when the ice-rich material sublimates. Very distinct rows can be seen near the south (bottom) wall of the valley. Lineated valley fill is thought to result from mass wasting (downslope movement) of ice-rich material from valley walls towards their centers. It is commonly found in valleys near the crustal dichotomy that separates the two hemispheres of Mars. The valley shown here joins four other valleys with lineated fill near the top left corner of this image. Their juncture is a topographic low, suggesting that the lineated valley fill from the different valleys may be flowing or creeping towards the low area (movement towards the upper left of the image). The valley walls appear smooth at first glance but are seen to be speckled with small craters several meters in diameter at HiRISE resolution (see contrast-enhanced subimage). This indicates that at least some of the wall material has been stable to mass wasting for some period of time. Also seen on the valley wall are elongated features shaped like teardrops. These are most likely slightly older craters that have been degraded due to potentially recent downhill creep. It is unknown whether the valley walls are shedding material today. The subimage is approximately 140 x 400 m (450 x 1280 ft). Image PSP_0 01372_2160 was taken by the High Resolution Imaging Science Experiment (HiRISE) camera onboard the Mars Reconnaissance Orbiter spacecraft on November 11, 2006. The complete image is centered at 35.5 degrees latitude, 56.8 degrees East longitude. The range to the target site was 290.3 km (181.4 miles). At this distance the image scale ranges from 58.1 cm/pixel (with 2 x 2 binning) to 116.2 cm/pixel (with 4 x 4 binning). This image has been map-projected to 50 cm/pixel and north is up. The image was taken at a local Mars time of 3:23 PM and the scene is illuminated from the west with a solar incidence angle of 48 degrees, thus the sun was about 42 degrees above the horizon. At a solar longitude of 133.8 degrees, the season on Mars is Northern Summer. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Mars Reconnaissance Orbiter for NASA's Science Mission Directorate, Washington. Lockheed Martin Space Systems, Denver, is the prime contractor for the project and built the spacecraft. The High Resolution Imaging Science Experiment is operated by the University of Arizona, Tucson, and the instrument was built by Ball Aerospace and Technology Corp., Boulder, Colo.
Original Caption Released with Image
|
|
Image Credit:
|
|
NASA/JPL/Univ. of Arizona
Image_Credit
NASA/JPL/Univ. of Arizona
Image Credit
|
|
Produced By:
|
|
University of Arizona/HiRise-LPL
Produced_By
University of Arizona/HiRise-LPL
Produced By
|
|
Mission:
|
|
Mars Reconnaissance Orbiter (MRO)
Mission
Mars Reconnaissance Orbiter (MRO)
Mission
|
|
Spacecraft:
|
|
Mars Reconnaissance Orbiter (MRO)
Spacecraft
Mars Reconnaissance Orbiter (MRO)
Spacecraft
|
|
Target Name:
|
|
Mars
Target_Name
Mars
Target Name
|
|
Is a satellite of:
|
|
Sol (our sun)
Is_a_satellite_of
Sol (our sun)
Is a satellite of
|
|
Instrument:
|
|
HiRISE
Instrument
HiRISE
Instrument
|
|
Product Size:
|
|
2048 samples x 3476 lines
Product_Size
2048 samples x 3476 lines
Product Size
|
|
facet_what:
|
|
Sun
facet_what
Sun
facet_what
|
|
facet_what:
|
|
Mars
facet_what
Mars
facet_what
|
|
facet_what:
|
|
MRO
facet_what
MRO
facet_what
|
|
facet_what:
|
|
Fossae
facet_what
Fossae
facet_what
|
|
facet_what:
|
|
Mars Reconnaissance Orbiter (MRO)
facet_what
Mars Reconnaissance Orbiter (MRO)
facet_what
|
|
facet_what:
|
|
High Resolution Imaging Science Experiment (HiRISE)
facet_what
High Resolution Imaging Science Experiment (HiRISE)
facet_what
|
|
facet_where:
|
|
Jet Propulsion Laboratory
facet_where
Jet Propulsion Laboratory
facet_where
|
|
facet_where:
|
|
Denver
facet_where
Denver
facet_where
|
|
facet_where:
|
|
Mars
facet_where
Mars
facet_where
|
|
facet_where:
|
|
Arizona
facet_where
Arizona
facet_where
|
|
facet_where:
|
|
California
facet_where
California
facet_where
|
|
facet_where:
|
|
Washington
facet_where
Washington
facet_where
|
|
facet_where:
|
|
The Valley
facet_where
The Valley
facet_where
|
|
facet_where:
|
|
Jet Propulsion Laboratory (JPL)
facet_where
Jet Propulsion Laboratory (JPL)
facet_where
|
|
facet_when:
|
|
November 11, 2006
facet_when
November 11, 2006
facet_when
|
|
facet_when_year:
|
|
2006
facet_when_year
2006
facet_when_year
|
|
Image #:
|
|
PIA09367
|
|
UID:
|
|
SPD-PHOTJ-PIA09367
UID
SPD-PHOTJ-PIA09367
UID
|
|
orignial url:
|
orignial_url
orignial url
|
