Re: Anasazi Astronomy

23 Apr 1995 17:01 CDT

In article <3n49h3$>, (William S. Lawson) writes...
>In article <>, (JAMES BENTHALL) writes:
>|> In article <3muhne$>, (Doug S. Caprette) writes...
>|> >In article> Robert Roosen <> writes:
>|> >>>
>|> >>Real simple. Get some radiocarbon dates from the pictographs. Has that
>|> >>been done?
>|> >
>|> >My understanding is that this is difficult to impossible due to the very small
>|> >quntity of organic residue left in those petroglyphs using organic pigments.
>|> >
>|> >Some Petroglyphs consist of inorganic pigments or just scratches in the rocks and
>|> >so cannot be carbon dated.
>|> petroglyphs are carved into the rock.
>|> pictographs are painted onto the rock.
>|> james
>Statues can sometimes be dated by measuring how far oxygen has diffused into
>the stone since it was exposed by carving. Might this be an option here?
> -- Bill Lawson
I've never heard of this (but that doesn't mean much). Normally, the
element measured is something that has leached "out" of the rock or has
been transformed into a different element since the rock's formation.
Measuring the amount of oxygen that has "diffused into the stone since it
was exposed by carving" doesn't intuitively seem like such a reliable
method of dating.

Those archaeologists will try _anything_ to feel like they're in a science!