STARCH, PHYTOLITH, AND ORGANIC RESIDUE (FTIR) ANALYSIS OF SAMPLES FROM SITE 24HL478, HILL COUNTY, MONTANA

Four fire-cracked rocks from site 24HL478 in Hill County, Montana, were submitted for starch grain and organic residue analysis. Samples were tested for organic residues using Fourier Transform Infrared Spectroscopy (FTIR). Because the starch extraction method used here also recovered phytoliths, any phytoliths of economical significance also were noted. Starch, phytolith, and organic residue analyses provide information regarding diet, specifically foods that might have been processed in association with fire-cracked rock at the site.美国蒙大拿州希尔县24HL478遗址出土的4件火烧裂石，被送至实验室开展淀粉粒与有机残留物分析。本次研究采用傅里叶变换红外光谱（Fourier Transform Infrared Spectroscopy, FTIR）对样品的有机残留物进行检测。由于本次采用的淀粉提取方法可同时回收植硅体，因此研究中也记录了所有具有经济意义的植硅体。淀粉粒、植硅体与有机残留物分析可揭示遗址内的饮食结构信息，尤其是与该遗址火烧裂石相关的加工食物种类。