PIA04191: Sitting on 'Voltaire'
 Target Name:  Mars
 Is a satellite of:  Sol (our sun)
 Mission:  Mars Exploration Rover (MER)
 Spacecraft:  Spirit
 Instrument:  Panoramic Camera
 Product Size:  1024 x 1024 pixels (w x h)
 Produced By:  Cornell University 
 Full-Res TIFF:  PIA04191.tif (3.15 MB)
 Full-Res JPEG:  PIA04191.jpg (193.1 kB)

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Original Caption Released with Image:
Annotated image of PIA04191 Sitting on 'Voltaire'
Annotated image of PIA04191
Sitting on 'Voltaire'

This false-color mosaic was taken with Spirit's panoramic camera on martian day, or sol, 554 (July 25, 2005), while Spirit was sitting on the "Voltaire" layered rock outcrop.

A rock within the Voltaire outcrop, called "Haussmann," exhibited many interesting patterns, including rounded pebbles that are approximately 2 to 3 centimeters (.8 to 1.2 inches) across. The pebbles are embedded in a finer-grained matrix of material. The striations in Haussmann are noted. The rounded pebbles must have been exposed to erosion in the past, before they were embedded into the rock.

The layered rocks in this area are thought to have formed from an impact event, as ejected deposits. They illustrate the complexity of the rocks found by Spirit as the rover made its way to the summit of Husband Hill.

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