CU-Boulder graduate student Christine Dixon in an ancient manioc planting bed that was buried and preserved under ten feet of ash following a volcanic eruption at the ancient village of Ceren in El Salvador roughly 600 A.D. Credit: Payson Sheets, Un
CU-Boulder graduate student Christine Dixon in an ancient manioc planting bed that was buried and preserved under ten feet of ash following a volcanic eruption at the ancient village of Ceren in El Salvador roughly 600 A.D. Credit: Payson Sheets, Un, [435334166] . Denver Public Library Digital Collections, accessed 10/02/2026, https://digital.denverlibrary.org/nodes/view/875288