Layers in Arsia Mons Volcano
NASA/JPL/University of Arizona
Layers in Arsia Mons Volcano
PSP_004412_1715  Science Theme: Geologic Contacts/Stratigraphy
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This image covers a pit in the lower West flank of Arsia Mons, one of the four giant volcanos of the Tharsis region.

Many layers are exposed in the pit, probably marking individual lava flows, and provide information about the nature of the volcanic eruptions. This image was acquired in the middle of large regional dust storms on Mars, but the atmosphere over this image is only moderately dusty because the altitude is 6.5 kilometers higher than the planetary mean, so the air is quite thin and cannot hold as much dust.

Although the atmosphere is not too dusty, the surface is buried by a dust layer meters thick. These high-altitude locations on Mars have thick dust deposits because the thin air cannot blow away the dust, or at least not as fast as it accumulates. On Earth the oceans serve as dust traps, but on Mars, it is the high volcanos.

Written by: Alfred McEwen  (18 July 2007)

This is a stereo pair with ESP_012310_1715.
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Acquisition date
06 July 2007

Local Mars time:
14:50

Latitude (centered)
-8.590°

Longitude (East)
236.373°

Range to target site
255.9 km (159.9 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:
0.5°

Phase angle:
44.2°

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

Solar longitude
271.1°, Northern Winter

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  337.8°
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ANAGLYPHS
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Full resolution JP2 download
Anaglyph details page

ADDITIONAL INFORMATION
B&W label
Color label
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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/University of Arizona

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.