HiRISE | Dusty Lava Flows on Ascreaus Mons (PSP_002209

NASA/JPL-Caltech/UArizona

Dusty Lava Flows on Ascreaus Mons
PSP_002209_1865 Science Theme: Volcanic Processes

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Ascreaus Mons is one of the giant shield volcanoes in the Tharsis region of Mars. Based on earlier lower resolution images, this location seemed to be ideal for examining how different types of lava flows interacted.

The smoother ground on the northwest side of the image is probably a lava flow with a relatively smooth crust much like "pahoehoe" lava flows in Hawaii.

The rugged terrain in the southwestern part of the image is indicative of a highly disrupted crust, possibly like what Hawaiians call an "aa" flow. Instead of confirming these hypotheses, HiRISE shows that the lava flow details are obscured by dust. The dust is carved into a curious network of scallops that are too small to have been seen by previous cameras.

Written by: Laszlo Kestay (7 March 2007)

Acquisition date
15 January 2007

Local Mars time
15:38

Latitude (centered)
6.565°

Longitude (East)
258.521°

Spacecraft altitude
265.5 km (165.0 miles)

Original image scale range
26.6 cm/pixel (with 1 x 1 binning) so objects ~80 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
1.1°

Phase angle
55.3°

Solar incidence angle
54°, with the Sun about 36° above the horizon

Solar longitude
167.2°, Northern Summer

For non-map projected images
North azimuth: 97°
Sub-solar azimuth: 8.3°

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Merged IRB
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Merged RGB
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RGB color
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map-projected   (624MB)

IRB color
map-projected   (351MB)

JP2 EXTRAS
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map-projected (270MB)
non-map           (358MB)

IRB color
map projected (102MB)
non-map           (285MB)

Merged IRB
map projected (167MB)

Merged RGB
map-projected (171MB)

RGB color
non map           (271MB)

ADDITIONAL INFORMATION
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products
HiView

NB
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

USAGE POLICY
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/JPL-Caltech/UArizona

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.