EXAMINATION OF DETRITAL CHARCOAL FROM ALONG THE UPPER GILA RIVER, ARIZONA

Detrital charcoal samples from along the Upper Gila River in Duncan Valley, southeast Arizona, were floated to recover organic fragments suitable for AMS radiocarbon analysis. Botanic components and detrital charcoal were identified, and potentially radiocarbon datable material was separated.采自美国亚利桑那州东南部邓肯谷沿上吉拉河（Upper Gila River）的碎屑炭屑（detrital charcoal）样品经浮选处理，以回收适用于加速器质谱仪（AMS）放射性碳测年分析的有机碎屑。研究人员对样品中的植物组分与碎屑炭屑进行了鉴定，并分离出具备放射性碳测年潜力的材料。