This article presents the first findings of a topographic survey plotting the location of archaeological material and of a technological study of the lithic industry at the SC-CHA-030 open-air archaeological site along the Pesqueiro riverbank, located in the upper course of the Uruguay River Basin in southwestern Brazil. We analyzed raw material selection and the production of shaped/façonnage tools (unifacial, bifacial, and trihedral) associated with the production (debitage) of cortical and semi-cortical flakes that were then transformed into tools by simple retouch. From the geoarchaeological point of view, the spatial distribution pattern of the material is meaningful in the context of the geomorphic transition between foothills and alluvial plain. Our study of technological behavior and the formation of archaeological sites finds that raw material and shaped pebble tools are a crucial aspect of the industries on the Paraná Basaltic Plateau of southern Brazil.

Este trabajo busca conocer las estrategias tecnológicas, los rangos de acción y la conectividad en las estrategias humanas de ambientes marginales. Se discute, para el caso del sur de Mendoza, el modelo clásico de trashumancia cazadora recolectora entre tierras bajas y altas. El estudio se centra específicamente en El Payén y en el uso de la obsidiana andina Laguna del Maule. En El Payén, esta obsidiana ocupa el primer lugar entre las variedades conocidas y su uso se vinculó a circuitos de movilidad estacional que involucraban tierras bajas y altas. La obsidiana Laguna del Maule posee dos subtipos geoquímicos, el Subtipo 1 registrado en cordillera, y el Subtipo 2 localizado en depósitos fluviales distales. En este trabajo modelamos las estrategias de interacción de tierras altas con tierras bajas, enfocándonos en modelos propuestos para La Payunia, que ponen énfasis en la tecnología lítica y se articulan con análisis geoquímicos y geoarqueológicos. Los resultados sostienen que las poblaciones de El Payén obtenían este recurso mediante distintas estrategias tecnológicas: un aprovisionamiento serial del Subtipo 2, con circuitos de movilidad centrados en tierras bajas; diferente al Subtipo 1 de aprovisionamiento cíclico, que habría involucrado la interacción entre tierras altas y tierras bajas.

For many years, the existence of ancient human settlements in the Amazon was deemed impossible, particularly those as old as 12,000 BP as found in Pedra Pintada Cave in Monte Alegre, in the state of Pará, by Anna Roosevelt and colleagues in the 1990s and by Edithe Pereira's team in 2014. In this article, we present the results of the technological analyses of the bifacial tools found in the cave, focusing on raw materials, techniques, shaping and retouching methods, and technical procedures. The analyses indicate careful knapping, with no mistakes, in hundreds of flakes in the shaping and retouching phases, as well as fragmented tools with flaws. Whenever possible, we compare the results to the data published by Roosevelt and colleagues in 1996 from the same site.

Este trabajo se focaliza en el análisis espacial intrasitio del material lítico procedente de un montículo de tierra del sitio arqueológico Pago Lindo (Departamento de Tacuarembó, Uruguay). Se realizaron análisis tecnológicos y distribucionales (vecino más cercano, K de Ripley y modelos kernel) que permitieron caracterizar distintas fases de ocupación y uso del espacio entre 3021 ± 32 y 690 ± 35 años 14C aP. Se reconoció una tecnología predominantemente expeditiva en la que no se observaron cambios significativos a través del tiempo. Los resultados de los análisis distribucionales muestran patrones heterogéneos que responden al uso diferencial del espacio en la estructura monticular. Los patrones agrupados, observados principalmente en microlascas, permitieron identificar sectores donde se localizaron espacios domésticos cuya ocupación y gestión de residuos contribuyó al crecimiento del montículo. También se reconocieron sectores donde las agrupaciones del material lítico tienden principalmente a la aleatoriedad, y que corresponden a episodios constructivos planificados. Esto es congruente con el modelo de crecimiento espaciotemporal discontinuo de las estructuras monticulares —basado en la alternancia de momentos de abandono y momentos de uso— pero también con episodios constructivos intencionales.

The three authors research surface archaeological records dominated by low-density scatters and isolated artifacts, archaeological phenomena frequently encountered during cultural resource management (CRM) projects in areas of the United States and Australia. We each began researching surface artifact scatters for different reasons but converged on approaches that emphasize the formation of these forms of archaeological deposits. Through a variety of projects, we asked a common set of questions about the processes that both buried and exposed these materials, the methods needed to obtain a chronology in different regions, and the ways we might interpret artifacts found together in different densities. Answering these questions led to the collection and analyses of datasets in innovative ways and the questioning of a number of archaeological categories often thought of as fundamental for archaeological research. Here, we review examples of our respective research and consider the implications for CRM projects dealing with surface lithics.

Este trabajo de tecnología lítica aborda los cambios acontecidos durante las ocupaciones de las últimas poblaciones cazadoras-recolectoras-domesticadoras, y de las sociedades agropastoriles tempranas en la Puna de Jujuy. En particular, tiene como objetivo reconstituir las cadenas operativas y los sistemas técnicos a partir de tres sitios de la cuenca de Barrancas entre aproximadamente 3750 y 1550 años cal aP. Los resultados comprenden varios análisis cuantitativos —incluyendo riqueza y diversidad— sobre las materias primas, los métodos de desbaste y de façonnage, y las unidades tecno-funcionales prensiles (UTFp). Los resultados demuestran que, a pesar de observarse continuidades, los cambios tecnológicos son significativos e incluyen rupturas. En particular, las evidencias indican una reorganización de los sistemas técnicos y de la gestión de las materias primas. Uno de los aspectos destacables es que el enastilamiento de instrumentos fue más importante durante el Holoceno medio que en el Holoceno tardío. Estos cambios se interpretan en el marco de una reestructuración social, económica y ecológica.

Fluting is a technological and morphological hallmark of some of the most iconic North American Paleoindian stone points. Through decades of detailed artifact analyses and replication experiments, archaeologists have spent considerable effort reconstructing how flute removals were achieved, and they have explored possible explanations of why fluting was such an important aspect of early point technologies. However, the end of fluting has been less thoroughly researched. In southern North America, fluting is recognized as a diagnostic characteristic of Clovis points dating to approximately 13,000 cal yr BP, the earliest widespread use of fluting. One thousand years later, fluting occurs more variably in Dalton and is no longer useful as a diagnostic indicator. How did fluting change, and why did point makers eventually abandon fluting? In this article, we use traditional 2D measurements, geometric morphometric (GM) analysis of 3D models, and 2D GM of flute cross sections to compare Clovis and Dalton point flute and basal morphologies. The significant differences observed show that fluting in Clovis was highly standardized, suggesting that fluting may have functioned to improve projectile durability. Because Dalton points were used increasingly as knives and other types of tools, maximizing projectile functionality became less important. We propose that fluting in Dalton is a vestigial technological trait retained beyond its original functional usefulness.

El Fin del Mundo is an archaeological site in Sonora, northwest Mexico, that contains a buried Clovis megafauna kill in a lowland area and concentrations of Clovis and later lithic materials scattered on the deflated surface of the surrounding uplands. The Clovis lithic assemblage from the site, identified by its technological and typological features, has been classified into three modes: bifaces, unifaces, and blades. The kill locality only contains Clovis points, whereas the assemblage from the uplands includes multiple bifaces reflecting diverse stages of the manufacture process from blank production to finished, highly reduced, and discarded broken Clovis points, numerous end scrapers, and blades and blade manufacture byproducts. This assemblage is indicative of a campsite where stone tool production and possibly other domestic tasks took place. In addition, a rhyolite outcrop near both the campsite and the kill was intensively exploited, as reflected in the high proportion of this raw material in the Clovis assemblage. Unequivocal association of the kill locality and the campsite is not confirmed; however, the configuration of the site indicates that the campsite was established in uplands near locations with water, game, and lithic resources.

Seeman, Morris, and Summers misrepresent or misunderstand the arguments we have made, as well as their own previous work. Here, we correct these inaccuracies. We also reiterate our support for hypothesis-driven and evidence-based research.

The connection between people in the prehispanic U.S. Southwest / Northwest Mexico (SW/NW) and Mesoamerica is one of the most debated research topics in American archaeology. SW/NW groups used objects from Mesoamerica, but did they also trade for obsidian? Archaeologists have yet to find Mesoamerican obsidian from confirmed prehispanic SW/NW contexts, but here we discuss four green obsidian prismatic blades from New Mexico and Arizona. Using EDXRF spectrometry, we demonstrate that the blades are from the Pachuca source in Mesoamerica. The blades were found at four sites that the Spanish and their Mexican Indian allies used or potentially visited beginning in AD 1540. Using lithic technological organization and historical narratives, we assess the credibility of the different hypothesized models of prehispanic SW/NW-Mesoamerican interaction and obsidian use by the Mexican Indian allies. We suggest that green Pachuca blades would have been traded into the SW/NW if interaction with Mesoamerica had occurred more frequently. We also offer reasons why archaeologists have found so few Mesoamerican obsidian blades at post-1540 sites. This research is relevant because it expands our knowledge about SW/NW-Mesoamerican connections and the Mexican Indian allies of the Spanish, who are an underrepresented group in the archaeological and historical records.

El objetivo de este trabajo es discutir las técnicas y estrategias de caza empleadas para la captura de pinnípedos en la desembocadura del Río Santa Cruz (Santa Cruz, Patagonia), particularmente en la localidad arqueológica Punta Entrada. Ésta se caracteriza por poseer amplias concentraciones de material arqueológico a cielo abierto en las cuales los restos de pinnípedos de las especies Otaria flavescens y Arctocephalus australis dominan los conjuntos zooarqueológicos, evidenciando que estos animales fueron una presa principal de los cazadores-recolectores durante los últimos 2.000 años aP. Los estudios del registro artefactual lítico sugieren el uso de diversos sistemas de armas combinados, entre los cuales se incluyen aquellos de circulación regional y uso general (lanzas) y otros netamente costeros y de uso específico, como son los rompecráneos, informando así la existencia de estrategias de caza particulares para estos animales y de artefactos destinados a tal fin.

Hafting is an important part of lithic technology that can increase our understanding of socioeconomic behavior in the past. In this article, we develop a holistic approach to studying hafting by using the concept of curation within a broader assessment of lithic technological organization in early villages. Early villages were loci of socioeconomic transformation as part of the shift from mobile foraging to more sedentary cultivation lifeways. We suggest that an examination of hafting can provide new insights into how early villagers negotiated technological requirements, economic decision making, and social interactions in these novel contexts. As a case study, we develop a curation index and apply it to an archaeological context of hafted and unhafted pointed tools from the early Neolithic village of Dhra’, Jordan. This curation index allows for a discussion of the technological, economic, and social dimensions of hafting strategies at Dhra’. The presence of multiple hafting traditions within early Neolithic villages of Southwest Asia is evidence of persistent social segmentation despite food storage and ritual practices that emphasized communal integration. Through the lens of lithic technological organization, we demonstrate that hafting and curation patterns can increase our understanding of technological, economic, and social strategies in early villages.