Until Caddo archaeologists begin to incorporate Bayesian analyses of radiocarbon dates on a more regular basis, we should, at minimum, use these data to identify those sites with probable components of archaeological contemporaneity. This can be done by highlighting sites with overlapping date ranges, and extending the spatial scope outward at regular increments (perhaps at 25, 50, 75 and 100 miles) to better illustrate and consider archaeological sites that contain those elements (ceramics, lithics, features, etc.) from known contexts that can increase our understanding of potential networks, interactions, and cultural transmission at specific temporal and spatial intervals. Those data could, and should, be used to explore the possible range in the structure of communities and the potential political/social alliances and networks that may have been operating within these areas.
My current work is aimed at demonstrating the need to re-date some of the important mound centers across the ancestral Caddo region in an effort to refine our interpretations. The Bayesian model above is a singular example of this, where dates from mound contexts at the George C. Davis site in east Texas are employed to explore the various features (including mounds, hearths, etc.). It is my goal to create a series of models that can be used within grant proposals aimed at funding such a re-dating project.
Additionally, aside from those criteria used to select suitable samples, we are using an outlier analysis in OxCal to identify samples that will be excluded from subsequent models.