Sol 4941, December 18, 2017. The Microscopic Imager took a three-frame composite of the workplane target, dubbed Carrizal, in front of Opportunity. The pebbles in the sandy soil vary from smooth to relatively rough.
At left center a curved mark shows where the instrument arm pressed gently on the surface, pushing several pebbles down into the soil. Click the image to enlarge it.
Opportunity raw images, its latest mission status, location map, and atmospheric opacity, known as tau.