Small Crater Near Upper Reach of Mamers Valles
Small Crater Near Upper Reach of Mamers Valles
PSP_010630_2115  Science Theme: 
This image was suggested by Mr. Dennis Mitchell's 8th grade NASA team, Evergreen Middle School, Cottonwood, Calif., as part of the HiRISE Quest Student Image Challenge.

They write: "Located near Mamers Valles, this image shows numerous fluvial features that indicate this area was once rich with water. The lineated valley fill suggests an ice-rich soil. (Of particular interest) is a small cone-like feature (located on the floor of a 2 kilometer diameter) impact crater in the center of the enlarged image.

"At first this resembles a cinder cone volcano on Earth. However, when magnified, it reveals a ... feature (found in Arctic regions) on Earth called a pingo. These are caused by ice protruding through the soil creating a positive-relief geologic feature. If you examine the smaller craters in the surrounding terrain you'll see a checkerboard pattern in each one. These closely resemble melted pingos on Earth, again suggesting an area of Mars that was once rich with water."

While the student's suggestion that the mound-like structure is a pingo is reasonable, there is yet no scientific consensus for the origin of these interesting structures.

Written by: Dennis Mitchell's class, Evergreen Middle School/Ginny Gulick  (10 June 2009)
Acquisition date
01 November 2008

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
290.3 km (180.4 miles)

Original image scale range
29.3 cm/pixel (with 1 x 1 binning) so objects ~88 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection

Emission angle

Phase angle

Solar incidence angle
54°, with the Sun about 36° above the horizon

Solar longitude
151.0°, Northern Summer

For non-map projected images
North azimuth:  96°
Sub-solar azimuth:  356.2°
Black and white
map projected  non-map

IRB color
map projected  non-map

Merged IRB
map projected

Merged RGB
map projected

RGB color
non-map projected

Black and white
map-projected   (1710MB)

IRB color
map-projected   (692MB)

Black and white
map-projected  (831MB)
non-map           (870MB)

IRB color
map projected  (328MB)
non-map           (630MB)

Merged IRB
map projected  (424MB)

Merged RGB
map-projected  (436MB)

RGB color
non map           (596MB)
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products

IRB: infrared-red-blue
RGB: red-green-blue
About color products (PDF)

Black & white is 5 km across; enhanced color about 1 km
For scale, use JPEG/JP2 black & white map-projected images

All of the images produced by HiRISE and accessible on this site are within the public domain: there are no restrictions on their usage by anyone in the public, including news or science organizations. We do ask for a credit line where possible:
NASA/JPL/University of Arizona

NASA’s Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, Calif., manages the Mars Reconnaissance Orbiter for NASA’s Science Mission Directorate, Washington. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona.