Follow this link to skip to the main content National Aeronautics and Space Administration Logo
NASA Banner
NASA Mars Exploration Program
Mars Exploration Program
Home
MULTIMEDIA

Images

As Opportunity continued to traverse from "Erebus Crater" toward "Victoria Crater," the rover navigated along exposures of bedrock between large, wind-blown ripples.
05.19.2006

Cobbles in Troughs Between Meridiani Ripples

As Opportunity continued to traverse from "Erebus Crater" toward "Victoria Crater," the rover navigated along exposures of bedrock between large, wind-blown ripples. Along the way, scientists studied fields of cobbles that sometimes appeared on trough floors between ripples. They also studied the banding patterns seen in large ripples.

This view, obtained by Opportunity's panoramic camera on the rover's 802nd Martian day (sol) of exploration (April 27, 2006), is a mosaic spanning about 30 degrees. It shows a field of cobbles nestled among wind-driven ripples that are about 20 centimeters (8 inches) high.

The origin of cobble fields like this one is unknown. The cobbles may be a lag of coarser material left behind from one or more soil deposits whose finer particles have blown away. The cobbles may be eroded fragments of meteoritic material, secondary ejecta of Mars rock thrown here from craters elsewhere on the surface, weathering remnants of locally-derived bedrock, or a mixture of these. Scientists will use the panoramic camera's multiple filters to study the rock types, variability and origins of the cobbles.

This is an approximately true-color rendering that combines separate images taken through the panoramic camera's 753-nanometer, 535-nanometer and 432-nanometer filters.

Image Credit: NASA/JPL-Caltech/Cornell

Browse Image  |  Medium Image  |  Full Res Image

<< RETURN TO IMAGES

USA.gov
PRIVACY     FAQ     SITEMAP     FEEDBACK     IMAGE POLICY