EXAMINATION OF BULK SOIL FOR RADIOCARBON DATABLE MATERIAL FROM THE MAPLETON MEGATRENCH, UTAH

A total of 10 bulk soil samples from the Mapleton megatrench site on the Provo segment of the Wasatch fault zone, Utah, were floated to recover organic fragments suitable for radiocarbon analysis. One sample was collected from the trench, while the remaining nine samples were recovered from Boreholes B1 and B2. Botanic components and detrital charcoal were identified, and potentially radiocarbon datable material was separated.从美国犹他州瓦萨奇断层带（Wasatch fault zone）普罗沃段（Provo segment）的梅普尔顿大型探槽采集的10份散装土壤样品，经浮选处理以回收适用于放射性碳分析（radiocarbon analysis）的有机碎屑。其中1份样品采自该探槽内，剩余9份样品取自钻孔B1与B2。研究人员鉴定出样品中的植物组分与碎屑炭（detrital charcoal），并分离出潜在可用于放射性碳定年的物质。