Being that the theme over and over agains seems like odd arms are being put into odd containers. But often I see that the overall theme could be the outline of the creatures in that particular outside floor memorial sculpture. So odd hands and arms could be the catastrophe that put them in rigor mortised containers made of the creatures that died earlier. Sometimes I think it is the catastrophe that did it and I kick around the idea that Martians labored to do it and it was just too overwhelming and let the dead bury the dead etc.
One thing that I see though are these tens of thousands of outside segmented memorial outside floor sculptures which sure seems dedicated to the loosing of their creatures when the catastrophe hit Mars in extreme antiquity when the Martians made these almost endless diorama like memorials. But they seem to be making processing creature memorials of how they made products out of them. It seems that way to me after seeing thousands of these types of outside floor sculptures.