Glaciation at the Eastern Hellas Margin
NASA/JPL/UArizona
Glaciation at the Eastern Hellas Margin
ESP_036947_1390  Science Theme: Geologic Contacts/Stratigraphy
Hellas Crater in the ancient highlands contains some of the clearest evidence on Mars for glacial processes. This image, on the eastern margin of the giant impact crater, shows a number of features consistent with glaciation.

There are roughly north-south running ridges and troughs which mark the deposition of sediment called moraine underneath or beside a glacier. There are also sinuous channels which may formed from meltwater underneath a glacier. A small (3.5 x 3.5 kilometer) cutout shows an example of the moraine and meltwater channel.



Written by: John Bridges (audio: Tre Gibbs)  (13 August 2014)
 
Acquisition date
14 June 2014

Local Mars time
15:39

Latitude (centered)
-40.681°

Longitude (East)
100.767°

Spacecraft altitude
253.4 km (157.5 miles)

Original image scale range
53.8 cm/pixel (with 2 x 2 binning) so objects ~161 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
19.3°

Phase angle
89.7°

Solar incidence angle
74°, with the Sun about 16° above the horizon

Solar longitude
145.7°, Northern Summer

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North azimuth:  95°
Sub-solar azimuth:  41.3°
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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.