Diverse Lava Flows on Olympus Mons
NASA/JPL-Caltech/UArizona
Diverse Lava Flows on Olympus Mons
ESP_017888_1950  Science Theme: Volcanic Processes
The flanks of Olympus Mons are covered with lava flow after lava flow. Most of these flows are relatively narrow flows with a channel running down the middle. They appear similar to the lava flows found on Mt. Etna in Sicily.

However, in this image, we see these typical lavas partially covered by another, more recent flow. This flow also has a central channel, but is about 10 times wider than the more typical flows.

At the center of the HiRISE image the channel disappears. This is probably because the channel was blocked here and lava spilled out of the channel and covered a broad, fan-shaped, area. The eruption that produced this unusual flow was probably more vigorous and perhaps lasted longer than the more common ones.

Written by: Lazlo Kestay  (23 June 2010)

This is a stereo pair with ESP_016820_1950.
 
Acquisition date
21 May 2010

Local Mars time
15:10

Latitude (centered)
14.850°

Longitude (East)
227.600°

Spacecraft altitude
268.5 km (166.9 miles)

Original image scale range
27.6 cm/pixel (with 1 x 1 binning) so objects ~83 cm across are resolved

Map projected scale
25 cm/pixel and North is up

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Equirectangular

Emission angle
14.6°

Phase angle
58.9°

Solar incidence angle
46°, with the Sun about 44° above the horizon

Solar longitude
93.6°, Northern Summer

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North azimuth:  97°
Sub-solar azimuth:  28.0°
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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.