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Creators/Authors contains: "Klehm, Carla"

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  1. ABSTRACT This article presents results from an unmanned aircraft system (UAS) aerial remote sensing study to improve understanding of Pueblo agricultural features in the Northern Rio Grande area of New Mexico that were in use by the 13th centuryad. It builds on previous archaeological research that has focused on recording precontact and historic Pueblo agricultural practices, pollen analyses and paleoclimatic reconstruction. Evidence suggests that Pueblo people were successfully growing crops including maize, cotton and wheat, in areas where, based on environmental conditions, they could not necessarily grow. This study seeks to better understand the environmental modifications employed by Pueblo peoples to enable growth of these crops. Cobble‐bordered gravel mulch field systems, thought to retain heat and moisture, are located throughout the study area. This article discusses the utility of airborne photogrammetry to locate and map gravel mulch fields on the landscape. Geographic information system (GIS) analysis of the UAS‐derived digital surface model includes slope, aspect and water flow direction and sink to shed light on gravel mulch field function. The article also discusses the potential of handheld and airborne infrared imaging for assessing the thermoregulation of these fields. Final consideration of how the survey results align with the priorities of the Tewa people for future arid‐land farming demonstrates additional utility of the approach. 
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    Free, publicly-accessible full text available April 1, 2026
  2. Advances built into recent sUASs (drones) offer a compelling possibility for field-based data collection in logistically challenging and GPS-denied environments. sUASs-based photogrammetry generates 3D models of features and landscapes, used extensively in archaeology as well as other field sciences. Until recently, navigation has been limited by the expertise of the pilot, as objects, like trees, and vertical or complex environments, such as cliffs, create significant risks to successful documentation. This article assesses sUASs’ capability for autonomous obstacle avoidance and 3D flight planning using data collection scenarios carried out in Black Mesa, Oklahoma. Imagery processed using commercial software confirmed that the collected data can build photogrammetric models suitable for general archaeological documentation. The results demonstrate that new capabilities in drones may open up new field environments previously considered inaccessible, too risky, or costly for fieldwork, especially for all but the most expert pilots. Emerging technologies for drone-based photogrammetry, such as the Skydio 2+ considered here, place remote, rugged terrain within reach of many archaeological research units in terms of commercial options and cost. 
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  3. Spatial data, under the broader umbrella of digital data, is becoming increasingly integral to all stages of archaeological research design and dissemination. As archaeologists lean toward reuse and interoperability, with ethics on their minds, how to treat spatial data is of particular importance. This is because of the complexities involved at every life-cycle stage, from collection to publication, including black box issues that may be taken for granted, and because the size of spatial data can lead to archiving difficulties. Here, the “DIY” momentum of increasingly accessible spatial methods such as photogrammetry and handheld lidar is examined alongside forthcoming changes in publication policies that will impact the United States in particular, framed around a conversation about best practices and a call for more comprehensive training for the archaeological community. At its heart, this special issue seeks to realize the potential of increasingly digitized—and increasingly large amounts of—archaeological data. Within cultural resource management, this means anticipating utilization of data through widespread standardization, among many interrelated activities. A desire to enhance the utility of archaeological data has distinct resonances with the use of spatial data in archaeology, as do some wider challenges that the archaeological community faces moving forward. 
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  4. This article describes the mineralogy and sources for a spectacular stone bead industry associated with the first pastoralists in eastern Africa ca. 5000–4000 CAL B.P. Around Lake Turkana, northwest Kenya, early pastoralists constructed at least seven mortuary monuments with platforms, pillars, cairns, and stone circles. Three sites—Lothagam North, Manemanya, and Jarigole—have yielded assemblages of stone and ostrich eggshell beads that adorned interred individuals. Mineralogical identification of the stone beads reveals patterns of material selection, including notable differences among the pillar sites. Geological sourcing indicates use of many local raw materials and two (amazonite and fluorite) whose known sources lie>200 km away. The data suggest that bead-making represented a significant investment by early pastoralists in personal ornamentation. New sociopolitical factors emerged, such as access to grazing grounds and water, and definitions of self and society manifested in novel mortuary traditions as people coped with a drying, cooling climate. 
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  5. Las escuelas de posgrado proveen oportunidades para que los estudiantes realicen trabajo de campo y reciban entrenamiento sobre métodos y teoría arqueológica, pero a menudo dejan de lado la instrucción sobre seguridad y bienestar en el campo. Argumentamos que una orientación más explícita sobre cómo llevar a cabo un trabajo de campo más seguro, contribuye al éxito general de los proyectos liderados por estudiantes, a la vez que los prepara como profesionales para dirigir programas de trabajo de campo seguros y exitosos. En este artículo, nos basamos en las experiencias recientes de estudiantes de posgrado, así como de los profesores que han supervisado trabajos de campo de posgrado, para esbozar reflexiones claves que permitan mejorar la seguridad y el bienestar en el campo y ofrecer recomendaciones para capacitaciones específicas y protocolos de seguridad. Al elaborar estos argumentos y recomendaciones, hemos considerado tanto proyectos de campo nacionales como internacionales, así como aquellos que involucran colaboración comunitaria. 
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