“…Archaeologists usually define the Formative (divided into Early, Middle, and Late, see Table 1) in the Titicaca Basin by the first appearance of ceramics in settled agricultural villages through the emergence of the Tiwanaku state by A.D. 500 (Bandy, 2005a;Janusek, 2004a;Stanish, 2003). Evidence of exchange in the Early Formative includes sodalite beads (Browman, 1981(Browman, , 1998, obsidian from the Chivay source (Burger et al, 2000, p. 348), sea shell (Bandy, 2005a, p. 95), and, very rarely, small fragments of gold, silver, and copper (Bandy, 2005a).…”