Comparison of Two Methods of Estimating Age at Death in a Chilean Preceramic Population

A method of histological determination of age at death, using the anterior cortex of the femur, was tested on a group of adult Preceramic skeletons from Chile (ca. 3300–3000 years BP). These skeletons had been previously studied by another investigator who assigned sex and morphological ages. Comparison of the results of the two methods of ageing indicates that, although there is considerable agreement between them at younger ages (20–39 years), discrepancies increase at older ages. It is clear that the morphological method is ‘truncated’, i.e. it does not take into account the possibility that some individuals could live past the age of 45 years. On the other hand, the open-ended histological method gives a realistic age range of 20–65 years for the Preceramic group, but an unrealistic number of individuals are aged 50 years and older. It is concluded that, in spite of certain advantages, the histological method must be used with caution in archaeological studies because exfoliation of peripheral unremodelled bone lamellae can cause over-ageing as deeper, more remodelled areas come to lie nearer the periosteal surface. © 1997 by John Wiley & Sons, Ltd.     

The Archaic Period in the south-central Andes

Although the Archaic Period of the south-central Andes is not well-known beyond Latin America, there is much of interest in it to archaeologists working with foraging populations. Like the North American Archaic and European Mesolithic, the Archaic in the region is characterized by ethnic differentiation, changes in the scale and frequency of residential mobility, resource intensification and specialization, and population growth. The origin and evolutionary trajectory of these trends are discussed within the context of the development of ecological complementarity, a strategy of land use that exploits the vertically stratified distribution of resources in the Andean environment.     

Stone-boiling maize with limestone: experimental results and implications for nutrition among SE Utah preceramic groups

Groups living on Cedar Mesa, SE Utah in the late Basketmaker II period (Grand Gulch phase, AD 200–400) were heavily maize-dependent, but lacked beans as a supplemental plant protein, and pottery vessels for cooking. Common occurrence of limestone fragments in their household middens suggests 1) limestone may have been used as the heating element for stone-boiling maize and 2) this practice might have made some maize proteins more available for human nutrition. Experiments examined these possibilities; results indicate that stone-boiling with Cedar Mesa limestone creates an alkaline cooking environment suitable for nixtamalization of maize kernels, and that maize cooked in this fashion shows significant increases in availability of lysine, tryptophan, and methionine. Archaeological limestone fragments from a Grand Gulch phase site show amounts of fragmentation and changes in density consistent with repeated heating. While not conclusive, these data indicate that further research (e.g., examination of archaeological limestone fragments for maize starch grains or phytoliths) is warranted. It is suggested that greater attention be paid to archaeological indications of stone-boiling with limestone among maize-dependent but pre-pottery societies.