1. Geochemical Characterization of Obsidian Subsources in Highland Guatemala Open Access Author: Carr, Sean Peter Title: Geochemical Characterization of Obsidian Subsources in Highland Guatemala Area of Honors: Anthropology Keywords: ObsidianGuatemalaPortable X-Ray FluorescencepXRFGeographic Information SystemsGIS File: Download carr_shc.pdf Thesis Supervisors: Kenneth Gale Hirth, Thesis SupervisorTimothy Michael Ryan, Thesis Honors AdvisorSarah Barbara Mcclure, Faculty Reader