Robot Arm - Observations and Excavations Options

[fredk]

But that clump is already gone in the sol 20 images

Or, as Mark Lemmon puts it,

Sol 019 More digging, dislodge interesting fragment

Sol 020 Continue dodo trenching, wantonly destroy fragment

[helvick]

That was exactly what I was thinking. I wonder did this happen because they are pushing an aggressive schedule (which they need to we're ~25% of the way into the primary mission already) and didn't have time to react to this interesting nugget or did they see it and decide to proceed in any case?