This image was acquired at the Viking Lander 2 site with camera number 2. The rounded rock in the center foreground is about 20 centimeters wide. The angular rock to the right and further back than the rounded rock is about 1.5 meters across. The dark facet on the upper right edge of the angular rock has a color similar to basalts on Earth. There are two trenches that were dug in the regolith to the right of the rounded rock, as well as one behind and slightly to the left. The gently sloping troughs between the artificial trenches and the angular rock which cut from the middle left to the lower right corner of the picture are natural surface features. This synthetic high resolution color image was created by combining standard low resolution Viking Lander color images with standard high resolution Viking Lander black and white images, using image processing techniques. In simple terms, the colors are separated from the color image. Using the computer, those colors are then painted onto high resolution images covering the same area. The image has had its colors balanced to approximate what a person would see on Mars. Since the Martian atmosphere carries extremely fine-grained red dust in suspension the "on Mars" images are redder. Credit: Mary A. Dale-Bannister, Washington University in St. Louis.