From the "Viking Archive" - Viking 2: surroundings

Caption NASA originale:"Viking 2 Lander close-up of the surface of Mars. The metal cylinder at right is the shroud for the surface sampler instrument, which was ejected after landing. To the left of it are trenches dug by the sampling arm, and at lower right part of a footpad can be seen. Note the holes in the rocks, which appear to be vesicles produced by gas bubbles when the rocks first solidified from lava. The camera is looking due east and local time is 19:47. The shroud is about 30 cm long. (Viking 2 Lander, 22G144)".