This is really cool. Look at the toe location along the top. It almost seems as if the second toe were sitting on top of the first and third does, like there may have been some sort of injury that didn't heal correctly. And the arc is really abrupt. I couldn't even begin to guess if sediment could have formed on top, but if it didn't this particular hominid could have had much larger arches or may not have even walked heel to toe.
You can see Homo ergaster and Homo erectus towards the bottom right.