Abstract: More than 1,000 bone fragments from Maanshan site (excavated in 1990'), approximately 2 kilometers southwest of Tongzhi, Guizhou Province, exhibit characteristics of weathering, erosing processes, gravitational damage, and surface modifications by animals, particularly by hominids. The degree of fragmentation of the 1imb bones (limb shafts and limb ends), which is characterized by two indices: circumference and length indices for limb bone specimens, and the hominid modifications of these bones show that these fragments were formed mainly by mar-row extracting and bone tool making. Fron these characteristics shown on the fragments, some behavior of the prehistoric habitants at the site and the formation process of the site are infer-red. Analysis of these bone fragments provides soune useful information for further study of the site.

Key words: Bone fragment; Modifica ion; Indicies of fragmentation; Ma'anshan Site