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Recipients of the Lister FellowshipAlyson Thibodeau
Alyson was a National Science Foundation-IGERT (Integrative Graduate Education and Research Traineeship) Fellow in Archaeological Science from 2004 to 2006. The IGERT program seeks to fundamentally change graduate education by providing opportunities for collaborative, interdisciplinary research and produce scholars who are leaders and creative agents for change in a globally engaged science and engineering workforce. In her research, Alyson uses geochemical techniques to address archaeological questions in the Southwestern United States, Mexico, and Belize. In particular, she uses isotopic tracers to infer the geologic sources of metals, minerals, and other materials that are found in the archaeological record. These studies allow Alyson to examine questions of human movement, resource procurement, and long-distance trade and interaction. Her research clarifies questions about the prehistoric mining and exchange of many types of raw materials, including turquoise, azurite, malachite, and lead ores. AbstractAlyson’s dissertation addresses a question of fundamental importance to the archaeology of the U.S. Southwest and Mexico: Can the turquoise objects found in archaeological sites be linked to specific geological sources? This question has generated tremendous interest among archaeologists because turquoise was prized by prehispanic societies living in both the U.S. Southwest and Mexico and was extensively mined and traded across these areas. Over the last 40 years, scientists have used a variety of chemical analyses, particularly trace element analyses, in attempts to link archaeological turquoise to geological sources. However, the utility of trace elements for the study of turquoise provenance has been limited due to the chemical variability of turquoise within individual deposits and the abundant impurities that are often closely associated with turquoise mineralization. Alyson has pioneered a new approach to turquoise provenance using lead and strontium isotope analyses. The objectives of her research are threefold: to construct a new geochemical framework for addressing questions of turquoise provenance in the U.S. Southwest and Mexico; to establish that this technique can be applied to archaeological samples; and to demonstrate how information about turquoise provenance can transform ideas about the procurement and exchange of this mineral among prehispanic societies. Over the past five years, Alyson has made more than 250 lead and strontium isotopic measurements on turquoise collected from 18 mining districts in the U.S. Southwest and northern Mexico. To date, her work indicates that lead and strontium isotopes define unique geochemical fingerprints for the majority of these turquoise sources and that lead and strontium isotope analyses can be successfully applied to turquoise with a variety of chemical and physical characteristics. Alyson has also demonstrated that the distinctive isotopic signatures of many turquoise sources can be understood in terms of the geological circumstances under which different deposits formed. Alyson’s dissertation will use the isotopic fingerprints of individual sources to infer the geologic provenance of turquoise found in archaeological sites. She is especially interested in evaluating claims about the source of turquoise found at sites in Chaco Canyon, New Mexico, and testing the idea that Pueblo societies of the Southwest U.S. traded turquoise to Mesoamerica. To address these questions, she will analyze turquoise from two of the world’s most important archaeological sites: Pueblo Bonito in Chaco Canyon and the Templo Mayor in Mexico City. Alyson’s dissertation will use the geochemical framework she has developed to address some of the most persistent and exciting questions of Southwestern and Mesoamerican archaeology. Her work promises to make a significant and lasting contribution to our knowledge of the prehispanic societies of these areas and offers the archaeological community a powerful new tool to investigate the social and political dynamics of Pueblo and Mesoamerican groups. Samuel Duwe
A stint as crew chief on the University of Arizona field school in east-central Arizona led to his Master's project, which focused on community organization at the Bailey Ruin. Using inductively coupled plasma mass spectrometry to discern unique "recipes" for slip and paint used on decorated pottery, Sam explored questions of craft production, community organization, and apprenticeship relationships among potters at a single site. For his dissertation research, he has returned to the Rio Grande drainage to study the processes of coalescence that accompanied the formation of Tewa pueblos after A.D. 1150. Sam has also conducted research at Early Copper Age (ECA) sites in Hungary. There, the transition from the Neolithic to the ECA appears to be a process of "de-aggregation," which poses an interesting counterpoint to his dissertation research on coalescence. AbstractThe working title of Sam's dissertation is "The Prehispanic Tewa World: Coalescence and Identity in the Northern Rio Grande Region, New Mexico." His research examines the formation of new group identities among ancestral Pueblo populations in the Tewa Basin, New Mexico, during the Coalition (A.D. 1150–1325) and Classic (A.D. 1325–1600) periods. The Tewa Basin is a portion of the Rio Grande drainage bounded by the Rio Chama drainage on the north and Frijoles Canyon on the south. The central question that Sam attempts to answer with his research is, How was the formation of a Tewa identity affected when small sites coalesced into large pueblos? He traces the development of more than 40 large pueblos during the Coalition and Classic periods and investigates how it came to be that only six of these remained occupied when the Spanish colonized New Mexico at the end of the sixteenth century. To examine the formation of Tewa pueblos and identity, Sam has designed multiple analyses to document three important topics: the movement of people, the movement of materials, and the development and elaboration of cosmologies. To reconstruct the movement of people, Sam will develop a high-resolution culture history for his study area. This will be accomplished by creating detailed site maps and analyzing 26,000 pottery sherds. The sizes of sites as determined from the maps will allow Sam to estimate how many people lived at each pueblo, and the pottery analysis will allow him to determine when they lived there. To analyze the movement of materials, Sam will determine the chemical composition of pottery using flight-laser ablation-inductively coupled plasma mass spectrometry. This analysis will be performed on 89 raw clay samples and 1,000 pottery sherds. The results will allow Sam to determine where pottery was manufactured and how it was exchanged—evidence of how people living in the various pueblos were interacting with one another. To understand the development and elaboration of cosmologies, Sam will analyze ethnographies, shrines, rock art, ritual architecture, and prominent natural features. This information will provide insights into how ritual landscapes were created and how cosmologies changed over time. Sam's research will add significantly to our knowledge of the Tewa Basin, will determine how a Tewa identity formed, and will clarify how Tewa culture changed as a result of population coalescence. Finally, the methods developed as a result of this study will be useful to archaeological researchers working in many other regions of the world. Scott G. Ortman
AbstractThe rise of population in the northern Rio Grande valley of New Mexico during the thirteenth century A.D. has long been linked to Pueblo migration from the Four Corners region to the west and northwest. The diversity of contemporary Pueblo languages in the Rio Grande suggests that people speaking several different languages took part in these migrations, but the material culture of postmigration Rio Grande sites does not map onto historic language distributions very well, and it does not exhibit obvious continuities with earlier archaeological cultures of the Four Corners. This lack of fit between language and archaeology is why the origin of the Rio Grande pueblos remains a classic puzzle in North American archaeology. This research takes a fresh look at this puzzle by investigating the origins of the Tewa, one of the major Pueblo groups of the Rio Grande. Specifically, it focuses on relationships between the present-day Tewa and the ancient population of the Mesa Verde region, that portion of the larger Four Corners region most commonly cited as the Tewa homeland. The project traces the genetic, linguistic, and cultural backgrounds of the Tewa using five lines of investigation: (1) an analysis of the biological relationships between Tewa and Mesa Verde populations, using data from skeletal remains; (2) a linguistic study to determine the length of time Tewa has been a distinct language; (3) the archaeological dating of sites with Tewa names to determine the length of time Tewa has been spoken in the Rio Grande; (4) an analysis linking metaphors expressed in Mesa Verde material culture and embedded in the Tewa language to determine whether Tewa was spoken in the Mesa Verde region prior to migration; and (5) an archaeological study of continuities and discontinuities in material culture between the Mesa Verde and Tewa regions, using frameworks derived from ethnographic and historic migration studies. This transdisciplinary research will clarify affiliations between specific American Indian communities and archaeological sites, and it may assist in the repatriation process mandated by federal law. It will also evaluate a new method for tracing speech communities and will contribute to reunification of the currently estranged subfields of anthropology. Finally, this research will greatly expand public interpretation of archaeological sites by reconstructing the languages that were spoken in ancient times at sites in southern Colorado and northern New Mexico, including sites in national parks and monuments visited by thousands of people every year. Diane Curewitz
AbstractThe fourteenth century saw great changes in the organization of Pueblo society in the northern Rio Grande area, changes which are as yet incompletely understood by archaeologists. The goal of the current research is to explore the relationship between pottery production and social organization at the transition between the Coalition (A.D. 11501325) and Classic (A.D. 13251600) periods, with a particular emphasis on pottery produced and exchanged at sites located in Bandelier National Monument, New Mexico. Analysis of pottery composition, technological and design attributes, and distribution patterns will demonstrate how population movement, aggregation, and a new ideological system combined to produce changes in regional production and exchange networks that affected settlement and social organization. As part of this study, comparative measures of pottery specialization will be developed, pottery-distribution patterns will be identified, and social networks based on the exchange of high-value goods will be analyzed. It is hypothesized that a new religious ideology with an emphasis on communal feasting conferred added social value on, and increased demand for, decorated serving and undecorated culinary vessels used in feasts. Use of these vessels in these contexts identified their owners as group members and ritual participants. Access to skills, materials, and ritual knowledge would have limited vessel production and increased specialization. The physical proximity of distantly related individuals in densely aggregated pueblos, combined with demand for the vessels, may have encouraged the development of new exchange-driven social relationships and nonreciprocal exchange networks. Donna M. Glowacki
AbstractThe large-scale regional depopulation of the northern San Juan is a momentous occurrence that had wide-reaching impacts across the American Southwest. As such, almost every aspect of the circumstances surrounding this occurrence has been intensively studied; however, studies focused on cooperative social relationships within the region and how they may have contributed to this large-scale depopulation have been lacking. This dissertation research focuses on determining the extent of interaction (cooperation) among pueblos in the northern San Juan region during the 1200s, the century which saw the beginning of the emigration from, and eventually the depopulation of, the region. Instrumental neutron activation analysis (INAA) is being used to document the production and distribution of Mesa Verde Black-on-white and corrugated pottery within the region to determine how cooperative networks were utilized during an unstable, stressful time. This research will also provide a synthetic database of regional settlement from A.D. 11501300 and suggest how variation in settlement organization and demography might have affected social ties. Linking intraregional ceramic data with regional settlement patterns will enable a better understanding of the context of large-scale emigration. Wesley Bernardini
AbstractThis research investigates the process of migration into the Hopi area, ca. A.D. 12751400, with the goal of understanding how the formation of the 14th-century settlement clusters affected their subsequent internal and external interactions. This period was characterized by a remarkable amount of population movement as Puebloan settlement in Arizona contracted to only two major population centers at Hopi and Zuni. Because these population centers remain occupied today, an understanding of how these clusters formedespecially the sources of their immigrants and the diversity of these immigrants' backgroundswill shed light not only on 14th-century social organization but on modern Native American contexts as well. This study provides an alternative to traditional archaeological perspectives on migration that begin research by grouping sites into settlement clusters and regions. Informed by Native American migration traditions, the perspective advocated here focuses instead on migrating groups, hypothesizing that migration involved unsynchronized, short-distance moves by many socially distinct, independent groups. Two lines of evidenceInstrumental Neutron Activation Analysis and a comparative analysis of petroglyph iconswill be used to evaluate this hypothesis, focusing on sites that are traditionally grouped into the Anderson Mesa and Homol'ovi settlement clusters of north-central Arizona. John Kantner
AbstractAnthropological scholarship has most often considered the development of sociocultural complexity to be a function of the need for group decision-making in the face of changing environmental conditions. In recent years, however, this view has come under scrutiny both for its failure to account for the empirical record and its theoretical dependence on untenable views of group adaptation and altruism. This dissertation starts from the premise that an improved view of sociopolitical change can be built from the perspective of methodological individualism through an examination of the effects of varying contexts on human decision-making. Building upon a foundation of evolutionary theory, the dissertation presents a model of sociopolitical change that focuses on self-interested behavior within social contexts. The model employs neo-Darwinian evolutionary theory to explore specific social and environmental contexts and their effects on human behavior, using modeling techniques from agent-based modeling, evolutionary biology, and behavioral ecology. To evaluate the theoretical model, the development of the prehistoric Chaco Anasazi of the Southwest United States is examined. This society, which emerged in northwestern New Mexico around A.D. 900 and dissolved in the A.D. 1100s, was characterized by the development of complex multi-village organization that included evidence for inequality and sociopolitical differentiation. The research focuses on a 2,500 sq km study area that was once the location of at least a dozen communities that participated in the so-called "Chacoan system." The dissertation tests expectations of the model by focusing on five communities. Two different lines of inquiry are pursued. First, elemental compositional analysis of ceramics from the communities was conducted to identify local patterns of production and exchange. Next, stylistic analyses were conducted on ceramic samples from these same communities in order to identify the differential use of specific design elements to symbolize group identity. The dissertation concludes that the results of the two analytical approaches are consistent with the expectations of the theoretical model of sociopolitical development, suggesting that the emergence of inequality and sociopolitical differentiation in the Chaco Anasazi case can be traced to context-dependent, self-interested human behavior. Ronald H. Towner
AbstractPueblito sites include masonry structures and forked-stick hogans in defensible positions in the traditional Navajo homeland of Dinetah. Pueblitos have been a key piece of evidence used to infer a massive immigration of Puebloans into the Navajo country following the Spanish Reconquest of New Mexico. Archaeological and tree-ring evidence places the sites in their proper temporal and geographic perspectives and suggests that immigration has been overstated as a factor in models of Navajo cultural development. An expanded pueblito site tree-ring database illuminates early Navajo wood-use behavior, the temporal and spatial patterning of pueblito site occupations, and relationships between climate and the Navajo occupation and abandonment of Dinetah. Wood-use behaviors identified at the pueblito sites include construction with freshly cut and stockpiled timbers, beam reuse, repair and remodeling of structures, and dead-wood use. Different selection criteria by the builders, combined with differential preservation, have resulted in different qualitative and quantitative data for pueblitos and forked-stick hogans. The wood-use model developed has serious implications for dating early Navajo structures. The tree-ring and archaeological data indicate that most pueblitos are neither temporally nor spatially related to Puebloan immigration or the Spanish Reconquest. Masonry structures and hogans at the sites are contemporaneous and were constructed by Navajos for protection against Ute raiders. Furthermore, most pueblitos were occupied for relatively short periods of time, and the regional population density was much lower than has been previously assumed. A dendroclimatic reconstruction indicates that the A.D. 1300s and late 1400s were both periods of relatively stable and favorable conditions that may have facilitated Navajo entry into the Dinetah. The drought of 1748, often cited as a cause of the abandonment of the Dinetah, was a single-year event and probably not a "push" in the abandonment. The wide geographic distribution of early Navajo settlement has been ignored because of the spectacular nature of and good preservation in pueblitos. A new model of Navajo ethnogenesis is based on a different early Navajo population distribution and a variety of other means of incorporating non-Athapaskan elements into Navajo culture. David R. Abbott
AbstractThe prehistoric Hohokam people of south-central Arizona are best known for their large and extensive irrigation works. However, just how the administration of the canal systems articulated with the organization of Hohokam society is an interesting and unresolved issue. In this study, substantial gains are made for reconstructing Hohokam social structure, the degree to which it was shaped by their irrigation economy, and the evolving interplay between hydraulic management and the pattern of Hohokam social relationships over time. A methodology is developed, based on the exchange of utilitarian ceramics over short distances (as little as 5 km), in order to trace social interaction between Hohokam populations who lived in the central Phoenix Basin between A.D. 1100 and 1400. Applications of the methodology show that hydraulic management had a pervasive influence on the organization of Hohokam social networks. In addition, there is new evidence to suggest an increase in Hohokam social complexity around A.D. 1275 that may have been directly linked to the inherent asymmetrical control of water in large irrigation economies. The ceramic methodology consists of two parts. First, it is demonstrated with geologic mapping, petrographic analyses, and electron microprobe assays, that the production sources of Hohokam utilitarian wares are closely associated with the pottery's temper, thereby enabling the participants in the exchange transaction to be identified. Second, the social relationship between the interacting parties can be inferred on the basis of the pottery's exchange value, which, in turn, is determined by an analysis of ceramic production and use. This ability to assess who among the Hohokam interacted with whom and the nature of their social ties provides a novel and powerful approach to study Hohokam social structure, which complements other approaches currently used by archaeologists. |
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