Correction.  Following Marley Brown's response, I went back to see what my
post had said and I see that I mis-stated my understanding of how/when
prehistorians started using stratigraphic excavation.  I meant to say that
"it did not catch on AT FIRST"  rather than "it did not really catch on
among prehistorians--particularly those working in areas where the soil
changes *are* particularly hard to see."
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*  Mary Ellin D'Agostino       *
*  [log in to unmask]   *
*  Department of Anthropology  *
*  University of California    *
*  Berkeley, CA 94720-3710     *
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