Posted: Fri Dec 01, 2006 6:00 pm
If Mike Waters (Texas A&M), et. al, were saying the possibility of the alleged footprints, embedded in the Xalnene Ash, dated at 1.3 million B.P., is extremely remote, because of the possibility of them being quarrying marks, they'd have a decent leg on which to stand.Note that the authors feel no need to reference the _consideration_ that the possiblity is "extremely remote".
But I think the reason Mike Waters (Texas A&M), et. al, think the possibility is "extremely remote", is because "modern" man can not have been in North America 1.3 million B.P., as that would precede their existence in Africa. And his predecessors were basically too stupid to pull off such a feat.
Fast forward, 2006: The Hueyatlaco Ash, resting above the Xalnene Ash, stratigraphically, is dated at 1.1 million years, by Paul Renne ( Berkeley's Geochronology Center...also the individual that was responsible for dating the Xalnene). The Hueyatlaco Ash securely caps stratigraphy which contain bifacial and unifacial tools, previously only designated to Hss technologies. Again, an argument from incredulity is employed as A&M's response.
At this point, I need to make a formal apology to the Berkeley guys. I bunched them in with A&M at the beginning of this thread, thinking they were also discounting the possibility. Actually, Berkeley's Geochronology Center did the Ar/Ar dating for the Xalnene and Hueyatlaco Ash, and provided the dates to A&M. I was under the false impression they were involved with the archeological interpretations.
Paul Renne, from Berkeley, is very highly regarded in the geological community. He did his sampling...did his analyses...and provided his dates: 1.3 million B.P. for the Xalnene Ash and 1.1 million B.P. for the Hueyatlaco Ash. I don't think he really gives a rats a** what the archeologists think.
I agree with Chris Hardaker, however: Berkeley still owes us a reconciliation with the other geological dating analyses (Naeser, Farley, Donelick, etc...)
Man, I like how geologists think!!
True scientists...hard science.