(a) (b)

Figure 6-4. Photographic comparison of the homogeneous Ob1 obsidian and the Ob2 obsidian with heterogeneities.

Building on the overview of the use of Ob1 and Ob2 obsidian in the preceding section (see Figure 6-3 and Table 6-8 above), further exploration of Ob1 and Ob2 distributions follows. The results show that Ob1 and Ob2 obsidian artifacts in the area of the Chivay source assume patterned distributions over space, and these distributions are probably linked to the use of obsidian for export and for bifacial tool production.