Approach Based On Rims
The most time-sensitive attribute of Rio Grande Glaze Ware pottery is the rim profiles of bowls, so most archaeologists sort potsherds beginning with the rims. In doing so they refer to Glaze A through Glaze F pottery, A rims being the earliest and F rims being the latest (Hawley 1950; Wilson 2005). This letter-based key was first developed by Harry Percival Mera (1933), drawing on an earlier, number-based key developed by Anna O. Shepard and Alfred V. Kidder (Kidder and Shepard 1936). Here, the first question is: what rim profile is present?
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