Sol 420, with a major swing in temperature and pressure status, a precursor to possible major local weather activity? Wind direction averages from widely varied direction each day. A high of 10 degrees F on Sol 419.
Sol 417. The uplifted arm and scoop resulted in a view showing both a tight packing of the rounded gravel sized pieces on the back wall of the hammered hole, and a right side apparent folded layer shape on the spot below where the scoop bottom would be in contact with the 'flexible' fold. Would the appearance be a real fold in a consolidating material? Is there sufficient material leaking from the arm above to alter the spot where the linear lighted fold seems to exist?
If the soil back wall is the 'duricrust' pattern, is it more a tight packed gravel altered by local conditions over a long time period? Is it not solid but rather tough rounded objects capable of falling into a hammered hole below the tip? If the objects are packed tighter in the hammered and wallowed hole, perhaps the loose material around the tube is residue from sorting?
Cropped section, 320x240 pixels, enlarged to 2X, DPI 72, 640x480 pixels. The central area is altered slightly.
Image credits, originals, NASA/JPL-Caltech