The remarkable finds from the trans-Holocene archaeological record excavated at Hogup Cave, Utah, helped define our understanding of Great Basin prehistory. However, many scholars doubt the integrity of the site's depositional sequence and resulting chronological interpretations. To resolve these concerns, we produce several Bayesian chronological models combining 14 new radiocarbon dates with the results of past dating efforts. We first present an examination of the excavation and previously derived dates, finding that several of the most anomalous dates can be accounted for by details in the excavation's field notes. We then report our new dates and construct an initial Bayesian chronological model to serve as a framework for three increasingly complex models synthesizing old and new dates from the site. The best-supported model divides the site's stratigraphy into four occupational phases: Strata 1 through 7 (9790 to 6490 cal B.P.), Stratum 8 (5840 to 3330 cal B.P.), Strata 9 and 10 (2870 to 2760 cal B.P.), and Strata 11 through 16 (2610 to 360 cal B.P.). This result raises several questions to direct future research and dating efforts at Hogup Cave and serves as a model for reevaluating complex stratigraphic sequences in western North America and beyond.

Archaeologists have long used the prehistoric inhabitants of the Phoenix Basin in south-central Arizona as an example of a failed or collapsed society, and most prehistorians still assert that Hohokam material culture patterns ended at the close of the Classic period (circa A.D. 1150–1450). Although researchers are increasingly recognizing connections between prehistoric and modern indigenous people, little consensus exists regarding the cause or causes of the dramatic alterations in material culture patterns that occurred in the region. Most archaeologists who have studied the changes at the end of the Classic period, however, have not fully considered the implications of previous and subsequent conditions, including similar and seemingly abrupt shifts in cultural practices that occurred both before and after this time. This paper uses Akimel O'Odham (i.e., Pima) cultural knowledge to contextualize the “Hohokam Collapse.” We show that this perspective of culture history explains the relationship between prehistoric and historic populations and answers many of the long-standing questions regarding cultural variation in the Phoenix Basin.

How much stone tools are reduced and their form changed from first use to discard bears upon issues such as typological integrity, curation rate, and effects of occupation span. But degree of reduction depends partly upon the measures used to gauge it. Most studies involve single indices that gauge reduction in different ways or at different scales, so results are difficult to compare between studies. In this pilot study, we compare four allometric reduction measures—one each based on length, length:thickness ratio, volume, and mass, estimated by comparing observed values in discarded tools to estimated original values—for consistency when applied to an endscraper sample from the Nobles Pond Paleoindian site in Ohio, USA. Fitted to the Weibull distribution, all measures suggest attrition compared to experimental controls, but variation among them demands reconciliation. A multifactorial method that weights individual measures by their principal-component loadings suggests attritional discard at increasing rate as reduction advances. More importantly, it addresses the growing problem of reconciling the many reduction measures in use, a major concern in this expanding research area.

In western North America, the Western Stemmed Tradition (WST) is contemporaneous with, but technologically different from, the Clovis Paleoindian Tradition as initially defined from the Great Plains and American Southwest. The foundational principles of WST lithic technology have not been as clearly delineated as those of their fluted and unfluted Paleoindian Tradition technological counterparts, largely due to the paucity of extensive WST lithic assemblages recovered from intact buried contexts. Recent excavations at the Cooper's Ferry site, located in western Idaho, revealed a stratified series of WST components spanning the late Pleistocene to early Holocene periods. The study of these components offers a unique opportunity to evaluate current expectations about WST lithic technology. Here, we describe the discovery, context, and contents of a new cache of 14 WST projectile points from the Cooper's Ferry site that provide clues about WST lithic reduction patterns and the design of early stemmed projectile points. We employ several novel methods of lithic analysis based on three-dimensional digital scanning technology and geometric morphometry and, in doing so, seek to demonstrate new ways of studying stone tools through the use of next-generation methods of lithic analysis applied to exploring the poorly known technological details of the WST.

Last Supper Cave, located in northwestern Nevada, was excavated in the 1960s and 1970s. It contained a rich record of human occupation spanning the Holocene, but many artifacts from the site, including a large basketry collection, remain unstudied. We report the results of our technological analysis and radiocarbon dating of 14 fiber sandals from Last Supper Cave, which include examples of Fort Rock, Multiple Warp, and Spiral Weft types found at other sites in the northwestern Great Basin. Radiocarbon dates on the sandals correspond well with previous dates from Last Supper Cave and suggest that it was visited episodically for over 10 millennia; however, when considered together with the growing list of dates from the site, the sandal dates suggest that Last Supper Cave saw a prolonged hiatus in occupation during the Middle Holocene—a pattern common at other sandal-bearing sites in the northwestern Great Basin.

Oregon's Fort Rock Cave is iconic in respect to both the archaeology of the northern Great Basin and the history of debate about when the Great Basin was colonized. In 1938, Luther Cressman recovered dozens of sagebrush bark sandals from beneath Mt. Mazama ash that were later radiocarbon dated to between 10,500 and 9350 cal B.P. In 1970, Stephen Bedwell reported finding lithic tools associated with a date of more than 15,000 cal B.P., a date dismissed as unreasonably old by most researchers. Now, with evidence of a nearly 15,000-year-old occupation at the nearby Paisley Five Mile Point Caves, we returned to Fort Rock Cave to evaluate the validity of Bedwell's claim, assess the stratigraphic integrity of remaining deposits, and determine the potential for future work at the site. Here, we report the results of additional fieldwork at Fort Rock Cave undertaken in 2015 and 2016, which supports the early Holocene occupation, but does not confirm a pre–10,500 cal B.P. human presence.

We present the recent results of a magnetometry survey of the Spring Lake Tract conducted during the summer of 2015 at Cahokia Mounds State Historic Site located along the Mississippi River Floodplain in southern Illinois. This tract, located southeast of Woodhenge and west of the Grand Plaza, is situated north of two known borrow pits and includes an additional, previously unidentified borrow pit. Through comparing our gradiometer results with our subsequent test excavations, we argue that this area of Cahokia potentially demonstrates an increase in building density at the Spring Lake Tract during the transition between the Terminal Late Woodland and Lohmann phases. In addition, our survey and exaction results demonstrate that this area was densely occupied between the Lohmann and Stirling phases. During the Moorehead phase, we identify a possible increase in habitation based on hypothesized structure density using statistical analyses of length and width ratios (m) and structure area (m2). Our preliminary results suggest that the Spring Lake Tract saw an increase in habitation during the Moorehead phase, a new perspective on the density and use of domestic space during Cahokia's late occupational history.

Maize fragments recovered from the Middle Woodland Holding site (11MS118) in the American Bottom have for several decades been recognized as the oldest directly dated maize east of the Mississippi River. A reevaluation of maize samples from this site indicates that finding was in error. Carbon isotope assessment (δ13C ratios) run on the original samples dated in 1994 indicated that they were not maize. Six additional samples originally identified as maize were submitted to the Illinois State Geological Survey for carbon ratio assessment and direct accelerated mass spectrometry dating. Three of the fragments, including one from the same feature dated previously, returned non-maize δ13C ratios. The other three samples were correctly identified as maize, but all returned post–A.D. 900 dates. These results invalidate the original report of Middle Woodland maize at Holding and support our ongoing reevaluations of maize histories in the American Bottom and western Illinois, which show that it was not an important cultivated crop plant in this part of the Midwest until about A.D. 900.

Historical zooarchaeologists have made significant contributions to key questions about the social, economic, and nutritional dimensions of domestic animal use in North American colonial contexts; however, techniques commonly employed in faunal analyses do not offer a means of assessing many important aspects of how animals were husbanded and traded. We apply isotopic analyses to faunal remains from archaeological sites to assess the social and economic importance of meat trade and consumption of local and foreign animal products in northeastern North America. Stable carbon and nitrogen isotope analyses of 310 cattle and pigs from 18 rural and urban archaeological sites in Upper Canada (present-day southern Ontario, Canada; ca. A.D. 1790–1890) are compared with livestock from contemporary American sources to quantify the importance of meat from different origins at rural and higher- and lower-status urban contexts. Results show significant differences between urban and rural households in the consumption of local animals and meat products acquired through long-distance trade. A striking pattern in urban contexts provides new evidence for the social significance of meat origins in historical Upper Canada and highlights the potential for isotopic approaches to reveal otherwise-hidden evidence for social and economic roles of animals in North American archaeology.

Bacheeishdíio (“Place Where Men Pack Meat”), now called Grapevine Creek in English, is the subject of Crow oral traditions that document the cultural significance of the landscape and celebrate centuries of bison hunting in the drainage. We report an ongoing, community-based project that integrates archaeological field training and research goals into a collaborative indigenous archaeology project supporting the expressed goal of the Crow Tribal Historic Preservation Office to prepare a district-level nomination for the Grapevine Creek drainage basin. This paper describes findings from field investigations that document buffalo jump locales, a previously unreported bison bonebed, and associated archaeological features in the drainage, grounding Crow oral traditions that document buffalo jumps and large-scale bison hunts firmly into the landscape. We take a holistic approach that incorporates multiple lines of evidence to assess the archaeological record associated with bison jumps and bison hunting on the Crow Reservation in southern Montana. Results of this project include an enriched understanding of the Grapevine Creek archaeological record, greater awareness of buffalo hunting strategies on the northwest Plains, and, through field training, enhanced cultural resource management capabilities for the Crow Tribal Historic Preservation Office.

This study presents the results of a single-grain optically stimulated luminescence (SG-OSL) analysis of brownware pottery from four Late Prehistoric-period sites in the Middle Rocky Mountains, Wyoming, USA. SG-OSL of quartz ceramic temper provides improved age control for sites where radiocarbon dating has proven problematic due to old wood, recent wildfires, and calibration uncertainties. SG-OSL results are compared to fine-grain infrared stimulated luminescence (FG-IRSL) results from the same sherds and associated radiocarbon ages. We find that the single-grain technique applied to quartz sand temper provides improved accuracy and precision over both FG-IRSL and radiocarbon. We compare our results to directly dated brownwares from the southern and eastern Great Basin based largely on thermoluminescence analysis. While brownware ceramics appear earliest in the southwestern Great Basin, our data show that the technology spread quickly to the northeastern margin of the Numic homelands. We suggest that knowledge of ceramic technology in Formative (i.e., Ancestral Pueblo and Fremont) societies was important in the adoption of pottery by Numic hunter-gatherers and that, like in the southwestern Great Basin, this technological adaptation in the Middle Rocky Mountains may have occurred within a context of resource intensification during the last 800 years.

The 1960s and 1970s excavations at Owl Cave (10BV30) recovered mammoth bone and Folsom-like points from the same strata, suggesting evidence for a post-Clovis mammoth kill. However, a synthesis of the excavation data was never published, and the locality has since been purged from the roster of sites with human/extinct megafauna associations. Here, we present dates on bone from the oldest stratum, review provenience data, conduct a bone-surface modification study, and present the results of a protein-residue analysis. Our study fails to make the case for mammoth hunting by Folsom peoples. Although two of the point fragments tested positive for horse or elephant protein, recent AMS dates indicate that all of the mammoth remains predate Folsom, and horse remains are absent from the Owl Cave collection. Further, no unambiguously cultural surface modifications were identified on any of the mammoth remains. Given the available data, the Owl Cave deposits are most parsimoniously read as containing a Folsom-age occupation in a buried context, the first of its kind in the desert West, but one nonetheless part of a palimpsest of terminal Pleistocene materials.

The Dust Cave cultural chronology and radiocarbon sequence is one of the most important in southeastern North America. In their initial interpretation, the excavators were unable to separate the dates of the early and later strata in ways that facilitate their use for defining the associated cultural components. Here the sequence is reevaluated using Bayesian statistics, one additional date, and assessment of potential outliers. The results produce a useable sequence of non-overlapping cultural components (within the uncertainties of radiocarbon dating) that will improve our understanding the Paleoindian and Early and Middle Archaic cultural chronology in the Southeast.

Radiocarbon dating using charcoal and bone collagen, two standards of archaeological chronology, can be difficult to impossible in environments where natural burning is common and bone does not preserve well. In such settings, charcoal ages cannot always be trusted and collagen is unavailable. Calcined bone can be a viable alternative medium in these situations but it has rarely been exploited in the Americas. One area that could benefit from its use is the forested Pacific Northwest. We compare calcined bone ages with charcoal and/or collagen dates from individual features or discrete cultural strata in 10 Washington, Oregon, Idaho, and British Columbia sites dating between 9000 and 100 B.P. Resulting radiocarbon age estimates based on calcined bone closely match those based on charcoal and/or collagen in nearly all cases. We obtained calcined bone dates from three additional Holocene-aged sites that had not previously produced accurate results, obtaining findings consistent with estimates based on cross dating. Preserving well where all other organic media of cultural origin are lost or unreliable, calcined bone holds promise for dating sites in conifer forests and other acidic soil settings, and can allow researchers to refine archaeological sequences that have long defied accurate chronometric analysis.

Radiocarbon dates on artifacts from a Puebloan shrine in New Mexico reveal a persistence in ritual practice for some 3,800 years. The dates indicate that the shrine had become an important location for ceremonial observances related to warfare by almost 2000 cal. B.C., coinciding with the time when food production was first practiced in the Southwest. The shrine exhibits continuity of ritual behavior, something that Puebloans may find unsurprising, but also changes in the artifacts deposited that indicate new technology, transformations of belief, and perhaps shifting cultural boundaries. After briefly describing this shrine, we discuss some of the artifacts that were deposited there, in particular atlatl darts and flat curved sticks with longitudinal facial grooves. We argue that both were used in ritual fights and then deposited in the shrine as offerings, establishing a behavioral tradition that set the precedent for ethnographic recognition of the site as an important war shrine. Atlatl darts are analogous with prayer sticks, the latter representing a derived form of this offering with arrows as an intermediary form. Flat curved sticks were used for defense against atlatl darts in duels that enhanced warrior status.

A cache of 12 soapstone vessels from the Claiborne site in Mississippi was recently repatriated to the state after being excavated in 1968 and removed to Ohio. As a locus of Poverty Point affiliation, Claiborne was positioned along a Gulf Coast route for the influx of soapstone into the lower Mississippi valley from quarries in the southern Appalachians, hundreds of kilometers to the east. Although residents of Claiborne were likely to have been active traders during the heyday of Poverty Point exchange, ca. 3600–3400 cal BP, new AMS assays on carbon deposits from seven of the soapstone vessels show that the cache was emplaced ~200 years later, during or shortly before the abandonment of Poverty Point. Reported here are the results of AMS assays, observations on vessel form and function, and preliminary inferences about the significance of the cache in the context of environmental and cultural change after 3200 cal BP.

A popular model for social evolution in the Santa Barbara Channel region holds that, during times of resource stress, islanders would trade with mainlanders for plant foods in order to supplement island diets. Recently, western sea-purslane (Sesuvium verrucosum) has been suggested as a primary food product involved in this exchange. This report presents new caloric values for Sesuvium verrucosum and other plant foods that have been indicated as possible cross-channel trade goods. We argue that western sea-purslane is unlikely to have been a major trade item and suggest an alternate possibility for the presence of sea-purslane seeds in archaeological middens on Santa Cruz Island. While climate change may indeed have impacted social histories in the Channel Region, we argue that current data do not support the transportation of plant foods as having been a major component in this process.

Heitman's (2016) feminist critique of Chacoan archaeology omits consideration of matrilineal descent theory.

The Abbott Farm National Historic Landmark is one of the more significant Woodland-period sites in the Northeast. Numerous Hopewellian cultural traits (copper artifacts, cremated burials, exotic cherts, and mica) have been identified at the site. Numerous potential geological sources for the mica artifacts exist in the Mid-Atlantic region. We explore two analytical methods to evaluate the most likely geological sources of the mica artifacts. Source and artifact specimens were analyzed using pXRF as well as neutron activation. Our pXRF data are suggestive, but show high analytical uncertainty. We make several recommendations relevant to future attempts that would use this kind of instrument to study sheet mica. Our neutron activation results are promising and suggest that geochemical sourcing of mica has much potential. Results of both assays suggest that most of the artifact specimens recovered from Abbott Farm share a similar chemistry, and this composition is very similar to mica from southeastern Pennsylvania. A cut-and-drilled pendant exhibits a chemical makeup distinctly different from all other artifacts and source specimens evaluated here. Although our results are preliminary, the application of modern analytical methods to extant archaeological collections has the potential to provide significant new information.

This article examines the extent to which the adoption of the horse created a transition in modes of production from hunting and gathering to nomadic pastoralism by tracing the horse's impact on Blackfoot settlement patterns and landscape use during the Precontact and Postcontact periods on the Northwestern Plains. While changes in hunting techniques, raiding frequencies, and certain social implications such as status and wealth differentiation have been studied from an ethnohistoric perspective, less work has been done to trace the subtle changes to patterns of landscape use that may have directly resulted from the adoption of horse husbandry by the Blackfoot people. This study applies Geographical Information Systems (GIS) technology to broadly distributed Precontact- and Contact-period archaeological sites of Alberta, Saskatchewan, and Montana to reveal the role of horse husbandry on landscape use in the Northwestern Plains. This research expands on previous ethnohistorical work, while also contributing a new, material dimension to the dynamics of this transition at various spatial scales.