Four-image caption; main image is LowerChance_A_JG06.
For release on March 23.

Image Title:
"Last Chance" Evidence of Ancient Water Flow

Caption:
This view of the lower portion of the martian rock called "Last Chance" shows a close-up of texture interpreted as cross-lamination evidence that sediments forming the rock were laid down in flowing water.  NASA's Opportunity took the image during the rover's 38th sol in Mars' Meridiani Planum region, on March 2, 2004. [Insert LowerChance_B_JG05.]  

In the central part of the image, the dip of fine layers at angles to each other (cross laminae) suggests that the water that created the cross-lamination was flowing from left to right. Interpretive black lines trace the cross-laminae.  Interpretive blue lines indicate boundaries of possible sets of cross-laminae.

A three-dimensional visualization of this portion of the rock offers additional details of the cross-lamination. [Insert LowerChance_C_JG08.]  The yellow arrow indicates a point of correlation between the visualization and the image from the panoramic camera.  [Insert LowerChance_D_JG07.] 

Image Credit: NASA/JPL/Cornell