Fig. 7. IDC images of the soil surface near the lander.

a Image shows the radial striations in the soil. High resolution digital elevation models show millimeters of relief between the ridges and grooves⁴⁴. Some elongate hills have pebbles at the lander facing end suggesting they protected the tails of material behind. The radial pattern and tails behind pebbles suggests dispersal of mostly unconsolidated sand away from the lander by the retrorockets. The lack of evidence for more significant scour around larger rocks suggests that only millimeters of sand has been removed around the lander (which would have minimal impact on clast and rock counts). The dark rectangle in the center of the image is the scoop at the end of the arm, which is 7.1 cm wide. The horseshoe shaped notch in the front blade of the scoop can be seen in the scoop indentation in Fig. 8b. b Image shows surface divots that record the displacement of the ~5 cm diameter pebble named Rolling Stones Rock. Approximately 10 divots show the pebble skipped and rolled about 1 m across the surface. The divots indicate the soils are fine grained and unconsolidated.