A Streamlined Island in Athabasca Valles
A Streamlined Island in Athabasca Valles
ESP_028519_1895  Science Theme: Volcanic Processes
This image completes a mosaic of images covering a collection of streamlined islands in Athabasca Valles. Streamlined islands form by a rapid erosive flow (catastrophic flooding) around an obstacle such as a resistant rock outcrop or surface armored by impact ejecta.

Examination of the margins of the islands can show evidence of terraces as in this image. Each terrace may indicate a different flow event or flood level, and can be used to reconstruct the history of flood events.

Written by: Mike Mellon (narration: Tre Gibbs)  (14 November 2012)
Acquisition date
26 August 2012

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
276.5 km (171.8 miles)

Original image scale range
28.0 cm/pixel (with 1 x 1 binning) so objects ~84 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection

Emission angle

Phase angle

Solar incidence angle
53°, with the Sun about 37° above the horizon

Solar longitude
161.4°, Northern Summer

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  7.9°
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   (468MB)

IRB color
map-projected   (540MB)

Black and white
map-projected  (286MB)
non-map           (253MB)

IRB color
map projected  (214MB)
non-map           (446MB)

Merged IRB
map projected  (157MB)

Merged RGB
map-projected  (148MB)

RGB color
non map           (451MB)
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

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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.