In this study we evaluate modern accumulation, dispersion and preservation patterns of guanaco bones (Lama guanicoe) and discuss their implications for the zooarchaeological record of coastal Tierra del Fuego in southern South America. We surveyed four environmental units: the supra-tidal zone, forests, grasslands, and peat bogs. The guanaco assemblages consist of both disarticulated and articulated bones, most represented by limbs and heads (only two nearly complete carcasses were recorded). Natural processes such as marine abrasion largely affected the preservation of specimens, while weathering is a conspicuous effect observed on bones from the forest. Age and sex profiles, as well as variability in preservation, reflect attritional deaths in different time periods. The guanaco seems to be found regularly along the southeast coasts, being an available resource for coastal and marine hunter-gatherers with relatively narrow foraging ranges. The presence of guanaco is higher during autumn and winter. Bone remains are subject to vertical migration in peat bogs, grasslands and other soft substrates, allowing time-averaging of faunal assemblage formations.
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