Fig. 3.

Lake-sediment profiles of Hg deposition and Andean archaeology. (A) Compilation of central Andean archaeology (EIP, Early Intermediate Period; LIP, Late Intermediate Period). (B) Profiles of Hg accumulation rates and flux ratios for lakes LY2, LY1, and Negrilla. Two intervals of marked Hg enrichment are shaded. Pre-Colonial Hg deposition peaks during the height of the Chavín culture, whereas the later rise occurs under Inca and subsequent Colonial control. This second period of extensive mining activity witnessed the long-range transport of Hg emissions, as shown by the onset of Hg deposition to Negrilla, ≈250 km east of Huancavelica.