Provenance studies of exotic materials along the frontiers of expansionary states provide
invaluable evidence of cultural interactions and systems of exchange. Here we present …

The Alca obsidian source in southern Peru is one of the largest and most geochemically
complex sources of volcanic glass in South America. Hunter-gatherers first discovered and …

There is a long history in the use of osseous materials from some of the earliest contexts of
the Andes, yet most technology studies have focused on durable materials of ceramic, metal …

Wari is sometimes described as the first empire of the Andes, conquering and controlling a
broad region during the Middle Horizon (600–1000 CE). This article synthesizes …

Abstract The Andagua Valley in the Department of Arequipa of southern Peru has only
recently seen systematic archaeological investigations, revealing ancient agricultural …

This article reports the identification of the Sayrosa Source, a minor geologic source of
volcanic glass referred to Rare Type-3 obsidian in the 1977 pilot study by Burger and Asaro …

During the Middle Horizon (AD 600–1000), obsidian was transported in greater quantities
and distances than ever before identified in the Andes, in part by the expansionary Wari …

The use of portable-XRF has allowed for greater ease of obsidian characterization
worldwide, as the technique is relatively fast, inexpensive, and non-destructive. This has …

ABSTRACT Statement of Retraction: Pastoral Paleoclimate Palimpsests of the South-Central
Andes: High-Altitude Herder Dwellings in the 2nd Millennium ad We, the Editor [s] and …

The South American continent is remarkably diverse in its ecological zones, spanning the
Amazon rainforest, the high-altitude Andes, and Tierra del Fuego. Yet the original human …