Exposures of Layered Rocks in the Argyre Region
Exposures of Layered Rocks in the Argyre Region
ESP_021947_1300  Science Theme: Sedimentary/Layering Processes
This observation shows great exposures of layered rocks in Argyre region. Could it be evidence for an ancient sea or lake?

The Argyre region, also known as the Agyre quadrangle by the USGS, is also home of the Argyre impact basin, which contains some ancient eroded terrains, as well as other impact craters that HiRISE has imaged: Green Crater, Galle Crater, and Charitum Montes.

This cutout from the color swath (approximately 1.2 kilometers across) shows some of the rocks and layers in greater and impressive detail. (Note: the cutout is not map-projected so North is approximately down.)

This caption is based on the original science rationale.

Written by: HiRISE Science Team  (2 May 2011)

This is a stereo pair with ESP_014167_1300.
Acquisition date
02 April 2011

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
251.7 km (156.4 miles)

Original image scale range
26.8 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

Emission angle

Phase angle

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

Solar longitude
266.4°, Northern Autumn

For non-map projected images
North azimuth:  98°
Sub-solar azimuth:  24.2°
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Black & white is 5 km across; enhanced color about 1 km
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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

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.