Hi Dar
Good to hear from you.
yes an interesting article , since it proves that the pieces have been shaped and not worn to that appearence. And to be found in assoc with (& I use the word assoc in a grammatical & not strictly archaeological sense) Heidelbergensis unleashes all sorts of possibilities re symbolic behaviour & all that means. But it does remain to be seen if the fossil was chronologically late, or the bone tools were early , for am I correct in saying they have no absolute date for the sita and are only dating it on a comparative basis of tool assemblages with Twin Rivers & Kalambo Falls.
Regards Rich.
Well, I'm certainly not qualified to say the three bone objects described in Barham et al. 2002 are "proven" to be genuine artifacts, but the authors seem to be convinced that they are, even while admitting that this will be a controversial issue inasmuch as prior to this announcement, "no substantiated evidence exists for the making of formal bone tools before 120 ka" It would be interesting to gain the opinion of a taphonomist on whether or not the grooves on the objects, as revealed by SEM, could possibly have some natural (as opposed to human) origin.
About the age of the Kabwe assemblage, (and again I'm very poorly qualified to answer), there is the one mentioned AAR (aspartic acid racemization) date of 110 ka from a hominid fragment, but the authors give reasons why this dating method should be disregarded.
Clark's investigations (as reported in Barham et al., since I have not read the original literature) convinced him that the entire Kabwe artifact assemblage was Middle Stone Age (MSA), and there *are* certain "hints" that I can read that suggest it is "early" MSA (before 120 ka). The information given in this recent paper, including the reconstructed section of the cave deposits (Fig. 1), and the authors' comments in the paragraph containing, "in the lower passage of the cave where lead levels are highest" (page 3 of the pdf), leads me to believe the date of the assemblage, including the famous "Rhodesian Man" skull, lies within the estimated range of c. 300-140 ka, and there's a good possibility that not all of the assemblage was deposited anywhere near the *same* time (i.e., a palimpsest), but I wouldn't want to put much of a stake on anything I say if you are a gambling man.
In truth, I'm ready to believe in "bone points" at 200-300 ka but, as usual, I'd like to see more than one example.
Also, I'd like here to acknowledge Greg's very good assessment of the current state of knowledge, as well as his suggested relationship "to other things going on" in the early MSA, which was posted today. But, I'll have to think more on what he has posted before offering any possible comment.
As I noted earlier this year on palanth-l, it (the MSA in general) is going through an interesting period of taxonomical/chronological readjustment.
Cheers,
Dar