The criteria used here for sites isolating through the dominance of particular material types are as follows for both lab analysis Lithics_I and Lithics_II. First, the lab results by SiteID (or isolated ArchID), showing count and percent, were shown in a table against material type in Arcmap. This table was joined to the All_ArchID_Centroids point geometry [link to Processing in Ch 5] so that lab results for lithic material types were aggregated by site or isolate. These features were then filtered by constructing a query where the artifact count for a geographical feature had to be greater than 5 so that relative percentages were meaningful. Finally, the index symbolized inFigure 6-22 is the Lithics_I lab results (the most comprehensive table) where Percentage of Non-obsidian lithic artifacts is greater than or equal to 50%.