Fig. 6
From: p3k14c, a synthetic global database of archaeological radiocarbon dates

The density of dated sites versus dates at continental scale. Each point represents an Administrative Level 1 region (state/province) within the continent. Each plot is log-log transformed. North America and Australia demonstrate an effectively linear relationship between dated site density and date density, while Central America, South America, Europe, Africa, and Asia have super-linear relationships such that regions with a higher density of dated sites have an enhanced number of dates for those sites.