Gullies in Bloom
Gullies in Bloom
ESP_022472_1285  Science Theme: Fluvial Processes
This observation shows mid-latitude-type gullies and dark and light materials. There are dunes in this crater as well (east of the gully aprons). One of the more stunning features is the gully formation right outside the center swath of the full image.

At HiRISE resolution, we can examine whether there has been activity in the gullies that post-dates the placement of windblown materials, like boulders down the slopes. We can also gather information to help determine the processes responsible for gully formation.

This caption is based on the original science rationale.

Written by: HiRISE Science Team  (20 July 2011)
Acquisition date
13 May 2011

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
251.9 km (156.5 miles)

Original image scale range
51.0 cm/pixel (with 2 x 2 binning) so objects ~153 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection

Emission angle

Phase angle

Solar incidence angle
41°, with the Sun about 49° above the horizon

Solar longitude
291.8°, Northern Winter

For non-map projected images
North azimuth:  96°
Sub-solar azimuth:  34.5°
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IRB color
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Merged IRB
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Merged RGB
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IRB color
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Black and white
map-projected  (67MB)
non-map           (90MB)

IRB color
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non-map           (91MB)

Merged IRB
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Merged RGB
map-projected  (146MB)

RGB color
non map           (85MB)
B&W label
Color label
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RGB: red-green-blue
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Black & white is 5 km across; enhanced color about 1 km
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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’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.