Possible Cyclic Bedding within a Crater in Arabia Terra
NASA/JPL/University of Arizona
Possible Cyclic Bedding within a Crater in Arabia Terra
ESP_018714_1890  Science Theme: Geologic Contacts/Stratigraphy
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This observation covers an outcrop of possible cyclic bedding within a crater in Arabia Terra.

"Cyclic bedding" refers to a pattern of layering caused by repeated fluctuations in the amount of available sediment that creates new rock layers. These fluctuations are caused by long-term changes in the region's climate, with periods on the order of millions, or possibly hundreds of millions of years. It's possible that even the wobble of the planet might be a contributing factor to cyclic bedding.

An image at HiRISE resolution can help evaluate the cyclicity of the beds, as well as test possible regional stratigraphic correlations, and perhaps, indications of a wetter past environment.

Written by: HIRISE Science Team (audio by Tre Gibbs)   (8 August 2013)

This is a stereo pair with ESP_019347_1890.

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Acquisition date
24 July 2010

Local Mars time:
15:22

Latitude (centered)
8.970°

Longitude (East)
358.062°

Range to target site
277.3 km (173.3 miles)

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

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle:
6.9°

Phase angle:
56.3°

Solar incidence angle
50°, with the Sun about 40° above the horizon

Solar longitude
122.9°, Northern Summer

North azimuth:
97°

Sub-solar azimuth:
25.3°
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Postscript
For information about NASA and agency programs on the Web, visit: http://www.nasa.gov. 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. Lockheed Martin Space Systems is the prime contractor for the project and built the spacecraft. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona. The image data were processed using the U.S. Geological Survey’s ISIS3 software.