Browsing by Subject "Mimbres"
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Item Quantitative analyses of plant remains from the NAN Ranch Ruin, Grant County, New Mexico(Texas A&M University, 2004-11-15) Rose, Carolyn JuneThe general architectural transition from semi-subterranean pithouses to surface pueblos that occurred across the prehistoric North American Southwest has been attributed to increased agricultural dependence. In this study macrobotanical ubiquity scores, percentages, diversity, and richness were compared between pithouse and pueblo assemblages from the NAN Ranch Ruin, Grant County, New Mexico, to assess whether or not the macrobotanical evidence supported a link between increased agricultural dependence and the pithouse to pueblo transition at the site. Rarely were differences between values of relative macrobotanical abundance from the two periods found to be significant. Ubiquity analyses provided some evidence for greater agricultural dependence in the pueblo period. Ubiquity scores declined between the pithouse and pueblo periods for all taxa recovered from both periods, except maize (Zea mays L.) and goosefoot (Chenopodium spp.), an aggressive agricultural weed, probably because the puebloan occupants of the NAN Ranch Ruin relied more on maize agriculture than did the pithouse occupants at the site. Cotton (Gossypium hirsutum L.) was recovered only from pueblo deposits, perhaps indicating that this crop was not grown during the earlier pithouse period. Significant differences that were detected between pithouse and pueblo values of relative macrobotanical abundance were most likely due to the effect of variable sample sizes, when all samples were combined for analysis, regardless of their recovery contexts. Although the effect of variable sample volume was controlled by analysis of sub-samples representing five liters of excavated soil, the sub-samples varied in the number of specimens present. This finding illustrates the effect of variable numbers of specimens per sample on measures of relative abundance and the importance of comparing similar contexts in quantitative studies.Item The Senescent Mimbres Population: An Application of the Transition Analysis to the NAN Ranch Ruin Skeletal Sample(2012-02-14) Lovings, AlineThis study uses Transition Analysis on the Mimbres skeletal remains of the NAN Ranch Ruin to provide a more complete picture of its demography. Previous attempts to reconstruct the demographic structure of prehistoric populations have been hindered by aging methods that provide biased age distribution. Early methods had a tendency to produce age distribution similar to that of the reference sample that was used to create them. In addition, they often overlooked sexual dimorphism and left out the senescent portion of the population which in turns produced inaccurate population structures. Transition Analysis is a multifactorial approach to estimate the age-at-death of adult skeletons that focuses on the cranium, the pubic symphysis and the auricular surface of the ilium. The method relies heavily on the Bayesian probability that a given trait or a given combination of traits is displayed at a given age, it recognizes sexual dimorphism, performs well on fragmentary skeletons and allows for the age estimation of older individuals. The NAN Ranch Ruin sample consists of over 240 individuals, including 185 from the Classic Period. A previous study focused on the 81 individuals from the Classic period that were collected during the first five years of excavations. Following age estimation of adult skeleton I constructed composite abridged life tables. For the Classic Period, I found a high infant mortality rate (47%) and low life expectancy at birth (21.14 years) as expected. However, this analysis produced different mortality patterns than older demographic studies, where mid adult mortality increases only slightly, decreases in late adulthood (40-55 years old) and increases again in senescence (55-80 years old), instead of increasing steadily in adulthood to culminate at age 50. This difference is a consequence of the aging methods that have been used to analyze other southwestern prehistoric samples. Finally, while I was not able to confirm different mortality patterns between males and females, I found that people from the east roomblock enjoyed greater longevity than those from the south roomblock, though the difference is not statistically significant.