Payson D. Sheets

Payson D. Sheets is an American archaeologist, Mayanist, and professor of anthropology at the University of Colorado Boulder. He is primarily known for his research in Pre-Columbian Mesoamerica and Lower Central America, most importantly for his work on the Maya civilization at Joya de Cerén in El Salvador (although he has worked throughout the western United States, Canada, Panama, Guatemala, Costa Rica, and Nicaragua). He specializes in Mesoamerican archaeology, lithic technology, ancient adaptations, geophysical applications, hazards research (sudden environmental change – particularly volcanic eruptions), and remote sensing. Provided by Wikipedia