There is no consensus on who built the numerous stone structures that dot the archaeological landscape in the northeastern United States. Professional archaeologists traditionally have attributed them to colonial farmers, but increasing numbers of archaeologists have joined many nonprofessional groups and Native Americans in arguing for Indigenous origins. Better understanding of these structures can be obtained by determining how old they are. This article reviews nearly 60 luminescence ages, on both sediments and rocks, that have been obtained in recent years. Many of the derived ages fall in the sixteenth century, between initial European contact and substantial colonial settlement. A few ages are significantly older, suggesting that this technology has a deeper origin. The results warrant more research into these structures and rethinking their significance.

Uplift of the overriding plate at a subduction zone denotes interseismic strain accumulation, which is subsequently released during a megathrust earthquake. Although most interseismic strain is thought to be released elastically, observations of uplifted coastal regions at subduction zones worldwide indicate that some strain may result in permanent uplift. The Grays Harbor and Willapa Bay (Washington, USA) coastal region of the Cascadia subduction zone hosts flights of marine terraces testifying to late Pleistocene rock uplift. Our new detailed mapping of the marine terraces recognizes nine new units, including estuarine and fluvial sediments. Luminescence dating, relative age based on soil maturity and terrace elevation, and an evaluation of previous ages from fossil shells collectively constrain the probable ages of three estuarine units to sea-level high stands during Marine Isotope Stages 5a, 5c, and 5e. We estimate an average uplift rate of 0.4 ± 0.1 mm/yr for the terraced estuarine units, consistent with other Pleistocene uplift and incision rates in Cascadia. When compared with observed interseismic vertical deformation, these rates suggest that about one-tenth of interseismic strain may become permanent. The values are permissible within the uncertainties of uplift based on regional estimates of interseismic vertical strain rates and of coseismic subsidence.

Shott (2022, American Antiquity 87:794–815) argues that making inferences from ceramic data requires first inferring use lives of vessels—something that is difficult to do. This comment argues that the problem of differential use life becomes more tractable if the assemblage, rather than the vessel, is the unit of analysis. Aside from empirical reasons, theoretical considerations also favor the assemblage as the appropriate unit.

We examine the Holocene loess record in the Heye Catchment on the margins of the Tibetan Plateau (TP) and China Loess Plateau (CLP) to determine: the region to which the Heye Catchment climate is more similar; temporal change in wind strength; and modification of the loess record by mass wasting and human activity. Luminescence and radiocarbon dating demonstrate loess deposited in two periods: >11–8.6 ka and <5.1 ka. The 8.6–5.1 ka depositional hiatus, which coincides with the Mid-Holocene Climatic Optimum, is more similar to the loess deposition cessation in the TP than to the loess deposition deceleration in the CLP. Grain-size analysis suggests the Heye loess is a mixture of at least three different grain-size distributions and that it may derive from multiple sources. A greater proportion of coarse sediments in the older loess may indicate stronger winds compared with the more recent depositional period. Gravel incorporated into younger loess most likely comes from bedrock exposed in slump scarps. Human occupation of the catchment, for which the earliest evidence is 3.4 ka, postdates the onset of slumping; thus the slumps may have created a livable environment for humans.

Established chronologies indicate a long-term ‘Hoabinhian’ hunter-gatherer occupation of Mainland Southeast Asia during the Terminal Pleistocene to Mid-Holocene (45 000–3000 years ago). Here, the authors re-examine the ‘Hoabinhian’ sequence from north-west Thailand using new radiocarbon and luminescence data from Spirit Cave, Steep Cliff Cave and Banyan Valley Cave. The results indicate that hunter-gatherers exploited this ecologically diverse region throughout the Terminal Pleistocene and the Pleistocene–Holocene transition, and into the period during which agricultural lifeways emerged in the Holocene. Hunter-gatherers did not abandon this highland region of Thailand during periods of environmental and socioeconomic change.

Although luminescence sensitivity of quartz grains of desert sands has been used in discriminating provenance, it still remains unclear about its spatiotemporal variations and climatic implications. In this paper, the luminescence sensitivity of quartz grains from the northern margin of the Chinese Loess Plateau (CLP) was studied using single-aliquot optically stimulated luminescence (OSL) and “pseudo” single-grain OSL measurements. Our results indicate that the OSL sensitivities have lower values in sand/loess beds and higher values in paleosols. We suggest that the variations in OSL sensitivity of quartz grains with depth on the CLP are mainly influenced by the origin of the quartz grains as they are related to the loess-sized material production processes and the migration of desert regions. More quartz grains of glacial origin with lower luminescence sensitivity, together with the reduced durations of irradiation and exposure cycles induced by shorter transport distance due to desert expansion, account for the lower luminescence sensitivity of glacial periods. Moreover, both the mountain processes and the retreat–advance of deserts are ultimately related to climatic changes, therefore, the orbital scale variations of luminescence sensitivity are controlled by glacial–interglacial oscillations on the CLP.

Stratigraphic records extending to Marine Oxygen Isotope Stage (MIS) 3 (57,000–29,000 cal yr BP) or older in Beringia are extremely rare. Three stratigraphic sections in interior western Alaska show near continuous sedimentological and environmental progressions extending from at least MIS 3, if not older, through MIS 1 (14,000 cal yr BP–present). The Kolmakof, Sue Creek, and VABM (vertical angle bench mark) Kuskokwim sections along the central Kuskokwim River, once a highland landscape at the fringe of central and eastern Beringia, contain aeolian deposition and soil sequences dating beyond 50,000 14C yr BP. Thick peaty soil, shallow lacustrine, and tephra deposits represent the MIS 3 interstade (or older). Sand sheet and loess deposits, wedge cast development, and very thin soil development mark the later MIS 3 period and the transition into the MIS 2 stade (29,000–14,000 cal yr BP). Loess accumulation with thicker soil development occurred between ~16,000–13,500 cal yr BP at the MIS 2 and MIS 1 transition. After ~13,500 cal yr BP, loess accumulation waned and peat development increased throughout MIS 1. These stratigraphic sequences represent transitions between a warm and moist period during MIS 3, to a cooler and more arid period during MIS 2, then a return to warmer and moister climates in MIS 1.

The archaeological record in the Negro River in central Uruguay Republic is remarkable for its richness, including the presence of a significant number of Paleoindian fishtail points. As part of ongoing research on the earliest human occupations in this region, luminescence dating is applied to develop a terminal Pleistocene-Holocene regional chronology. Eight ages were derived from six samples taken from sedimentary fluvial deposits from two sites near the city of Paso de los Toros. The resulting dates span 11.8 and 1.04 ka corresponding to the Late Pleistocene and the whole Holocene. Because the chronology of the sedimentary sequences spanning these ages is poorly known, the presented results become a significant contribution to the construction of a chronostratigraphy sequence in the area. The results also show how single-grain dating can distinguish different components of mixed assemblages.

The earliest peopling of South America remains a contentious issue. Despite the growing amount of new evidence becoming available, and improved excavation and dating techniques, few sites have yet to be securely assigned to a period earlier than 12000 BP. The Santa Elina shelter in Brazil, located at the convergence of two major river basins, is one of them. The excavations at the site, including the results of various dating programmes, are described here along with reflections on the unique insights offered by Santa Elina into early migration routes into the Southern Cone.

Stone alignments, including tipi rings and drive lines, are abundant on the northern Plains and adjacent Rocky Mountains, but they have been notoriously difficult to date. This paper applies luminescence dating to sediments directly underneath the rocks to estimate the age of placement of the rock. This is based on the assumption that before the rock was emplaced, turbation processes brought sufficient grains to the surface, where sunlight reset the signal. Single-grain dating of potassium feldspars allowed isolation of these original well-bleached grains, which by now have built up a signal because the rock prevents transfer to the surface. Plotting the number of original well-bleached grains with depth showed that these grains were concentrated just under the rock and decreased with depth. This is what would be predicted if the assumption is true. Dates were derived from several samples from Kutoyis in north central Montana, from Whitewater in eastern Montana, and from several sites in northwestern Wyoming. Many samples from Kutoyis and Wyoming dated to the last 600 years, but some samples from both places were more than 2,000 years old. The Whitewater features also dated to around 2,000 years ago. The ages are consistent with the cultural history of the areas.

Luminescence dating provides a direct age estimate of the time of last exposure of quartz or feldspar minerals to light or heat and has been successfully applied to deposits, rock surfaces, and fired materials in a number of archaeological and geological settings. Sampling strategies are diverse and can be customized depending on local circumstances, although all sediment samples need to include a light-safe sample and material for dose-rate determination. The accuracy and precision of luminescence dating results are directly related to the type and quality of the material sampled and sample collection methods in the field. Selection of target material for dating should include considerations of adequacy of resetting of the luminescence signal (optical and thermal bleaching), the ability to characterize the radioactive environment surrounding the sample (dose rate), and the lack of evidence for post-depositional mixing (bioturbation in soils and sediment). Sample strategies for collection of samples from sedimentary settings and fired materials are discussed. This paper should be used as a guide for luminescence sampling and is meant to provide essential background information on how to properly collect samples and on the types of materials suitable for luminescence dating.

Early Archaic human skeletal remains found in a burial context in Lapa doSanto in east-central Brazil provide a rare glimpse into the lives ofhunter-gatherer communities in South America, including their rituals fordealing with the dead. These included the reduction of the body by means ofmutilation, defleshing, tooth removal, exposure to fire and possiblycannibalism, followed by the secondary burial of the remains according tostrict rules. In a later period, pits were filled with disarticulated bonesof a single individual without signs of body manipulation, demonstratingthat the region was inhabited by dynamic groups in constant transformationover a period of centuries.

Direct dating of artifacts is preferable to dating via association in most archaeological situations. In this article we describe and discuss the first application of accelerator mass spectrometry (AMS) to directly date temper particles in shell-tempered pottery. This method can be applied to ceramics from around the world that are tempered with freshwater or marine shell. To assess the method, we examine 34 new or previously reported dates (AMS dates on shell temper, paired luminescence dates from the same ceramics, and associated radiocarbon dates on other biotic materials) from seven sites in a variety of geological settings in the state of Mississippi. The results show that a freshwater reservoir effect is present in most cases. Other potential complicating factors include variable carbon input and metabolic uptake rates over space and time and the effects of burning during temper preparation or pottery firing. Despite these problems, the method holds promise for dating surface materials, museum specimens, and burial accompaniments; for investigating settlement patterns; and for other areas of research.

The chronology of shell-tempered pottery in the eastern United States is poorly understood, preventing any resolution to the question of how this pottery came to dominate ceramic assemblages in the late prehistoric period. Part of the problem lies in traditional dating methods that either provide only average dates that suppress variation or address depositional rather than manufacturing events. Better resolution can be obtained by dating individual artifacts. Luminescence dates for 67 ceramics from several sites in the mid-South show variation in age of ceramics from a single assemblage, strong chronological overlap between shell- and grog-tempered pottery, and suggest that shell-tempered pottery may have been present in low frequencies earlier than generally assumed and before it rose in frequency sometime after A.D. 900.

Middle Archaic earthen mound complexes in the lower Mississippi valley are remote antecedents of the famous but much younger Poverty Point earthworks. Watson Brake is the largest and most complex of these early mound sites. Very extensive coring and stratigraphic studies, aided by 25 radiocarbon dates and six luminescence dates, show that minor earthworks were begun here at ca. 3500 B.C. in association with an oval arrangement of burned rock middens at the edge of a stream terrace. The full extent of the first earthworks is not yet known. Substantial moundraising began ca. 3350 B.C. and continued in stages until some time after 3000 B.C. when the site was abandoned. All 11 mounds and their connecting ridges were occupied between building bursts. Soils formed on some of these temporary surfaces, while lithics, fire-cracked rock, and fired clay/loam objects became scattered throughout the mound fills. Faunal and floral remains from a basal midden indicate all-season occupation, supported by broad-spectrum foraging centered on nuts, fish, and deer. All the overlying fills are so acidic that organics have not survived. The area enclosed by the mounds was kept clean of debris, suggesting its use as ritual space. The reasons why such elaborate activities first occurred here remain elusive. However, some building bursts covary with very well-documented increases in El Niño/Southern Oscillation events. During such rapid increases in ENSO frequencies, rainfall becomes extremely erratic and unpredictable. It may be that early moundraising was a communal response to new stresses of droughts and flooding that created a suddenly more unpredictable food base.

Our ability to order chronologically the archaeological record has long been linked to our capacity to generate explanations. Evolutionary explanations make even greater demands on chronological data requirements than most other approaches. Single date characterizations of deposits are wholly inadequate. Rather, we require distributions of dates that can be used to estimate duration and rates of assemblage formation. In addition, the events dated must have direct archaeological relevance such as artifact manufacture or deposition. In a study of the evolution of social complexity in the late prehistoric record of the central Mississippi River valley, luminescence dates of sherds that have been assigned to a single culture historical type provide a means of determining the chronological character of assemblages derived from large village deposits. In this way, the temporal data requirements for evolutionary accounts can be met reliably.

Dating of early Navajo residence and special use sites, ca. A.D. 1500-1775, has been hampered by a lack of datable materials and poor precision in radiocarbon results. Methods described in this paper use materials ubiquitous at early Navajo sites in northwestern New Mexico and employ a dual strategy involving tree-ring dating of nonarchitectural wood and thermoluminescence assay of ceramics and burned rock. Comparison of samples obtained from a number of sites near the Morris Site 1 pueblito indicates remarkable correspondence between tree-ring and thermoluminescence results. These techniques are argued to have considerable reliability for relatively recent cultural manifestations such as these early Navajo sites. Thermoluminescence in particular may be useful in protohistoric contexts where tree-ring dating is unavailable. The thermoluminescence technique has the added benefit of directly dating pottery sherds, which can be useful for developing ceramic cross-dating sequences.

The river valley clays used for prehistoric pottery throughout much of Eastern North America require a nonplastic additive, or temper, to improve their workability and reduce drying shrinkage. During the Late Prehistoric (roughly after 900 AD) crushed shell was added as temper along most of the river valleys of the Midwest and along portions of the Gulf and Atlantic coasts.

Results of strength tests on sand- and shell-tempered ceramics reported by Bronitsky and Hamer (1986) are difficult to interpret because of flawed experimental procedures and have questionable relevance to the archaeological record. Results from an improved procedure suggest shell-tempered ceramics as produced in prehistoric southeastern Missouri were stronger and tougher than sand-tempered counterparts.