Central Peak Gullies
NASA/JPL/UArizona
Central Peak Gullies
PSP_006162_1365  Science Theme: Fluvial Processes
Lohse Crater is a heavily degraded southern hemisphere crater. This image cuts through its center.

The mounds on the left of the image are part of the crater’s central peak, showing material that was uplifted during the late stages of its formation. The central peak hosts gullies that are small-scale features of possible fluvial origin, although other origins are not as yet excluded. If they are fluvial, where could the water have come from?

There are many possibilities, but one idea in this case is that some water ice could have been trapped when the central peak formed, and that the ice was melted later to form the gullies. The faint, black, wispy lines criss-crossing slopes and terrain on the floor of the crater are dust devil tracks. Dust devils are little cyclones that stir up dust as they travel across the surface.


Written by: Kelly Kolb  (16 July 2008)

This is a stereo pair with PSP_007085_1365.
 
Acquisition date
19 November 2007

Local Mars time
14:27

Latitude (centered)
-43.241°

Longitude (East)
343.251°

Spacecraft altitude
256.2 km (159.2 miles)

Original image scale range
25.6 cm/pixel (with 1 x 1 binning) so objects ~77 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
0.3°

Phase angle
51.0°

Solar incidence angle
51°, with the Sun about 39° above the horizon

Solar longitude
349.8°, Northern Winter

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North azimuth:  97°
Sub-solar azimuth:  44.8°
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POSTSCRIPT
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.