Alexander Cherkinsky
Datos Biográficos
| ID | 234348 |
|---|---|
| NOMBRE | Alexander Cherkinsky |
| NOMBRES | Alexander |
| APELLIDO | Cherkinsky |
| FIRMA | CHERKINSKY A |
| AFILIACIONES | University of Georgia |
| ORCID | 0000-0002-6412-7233 |
| VERIFICADO | Sí |
| TOTAL DE OBRAS | 58 |
| TOTAL DE CITAS | 192 |
| TOTAL COMO AUTOR | 58 |
| TOTAL COMO EDITOR | 0 |
| PRIMER AÑO DE PUBLICACIÓN | 1992 |
| AÑO MÁS RECIENTE DE PUBLICACIÓN | 2025 |
| ÍNDICE H | 7 |
Radiocarbon dating of the Church of St. Margaret of Antioch in Kopčany (Slovakia)
An international consortium of radiocarbon laboratories has established the origin of the Church of St. Margaret of Antioch in Kopčany (Slovakia), because its age was not well known from previous investigations. In total, 13 samples of charcoal, wood, mortar, and plaster were analyzed. The 14 C results obtained from the different laboratories, as well as between the different sample types, were in good agreement. Resulting the final 14 C calibrat…
Paleodietary studies on bioapatite of the inhabitants of the northern Patagonian Archipelago of Chile from the late Holocene to European contact
A comparative analysis of the efficacy of dating various lake sediment-sourced materials for radiocarbon chronology development
This study presents a comparative analysis of the radiocarbon dates obtained on paired samples of various organic materials extracted from a lake sediment core. AMS radiocarbon dating of bulk sediment, chironomid capsules, and Trapa seeds was conducted to assess whether systematic offsets exist in the dates obtained on material that are commonly used to develop chronological frameworks for lake-based paleoenvironmental research. The findings reve…
Radiocarbon age offsets in post-bomb terrestrial snails from the Florida Peninsula, USA
Terrestrial gastropods can incorporate carbon from multiple sources, including 14 C-depleted carbonate from limestone, known as the “Limestone Problem” (Goodfriend and Stipp 1983). This affects the reliability of 14 C dating on terrestrial snails, and varies by species, habitat, and physiography, necessitating local validation studies. This study assessed whether two land snail taxa common in carbonate terrains of Florida (USA) accurately reflect…
Radiocarbon Mortar Dating Intercomparison Modis2—approach From the Zagreb Radiocarbon Laboratory, Croatia
The Second International Mortar Dating Intercomparison Study (MODIS2) took place in 2020. Three mortar samples from different sites and chronologies were distributed among various research groups in form of bulk mortar and grain fraction smaller than 150 μm. This is the first time the Zagreb Radiocarbon Laboratory, with support of the Center of Applied Isotope Studies, University of Georgia, took part in the international mortar intercomparison. …
Comparing Bioapatite and Collagen Radiocarbon Dates From a 16th Century Cemetery Context—el Japón, Xochimilco, Mexico City
El Japón is a 16th century hamlet site in the marshlands of the southern Basin of Mexico in central Mesoamerica. Radiocarbon ( 14 C) dating and OxCal modeling of human bone collagen (n = 11) identifies a range of burials at El Japón cemetery from 1550–1650 cal. CE. The refined chronology identifies use of this rural settlement well after the onset of colonial government-sponsored relocation of Indigenous people to larger settlements (congregacion…
Annual isotopic diet (δ 13 C) of Eremotherium laurillardi (Lund, 1842) and climate variation (δ 18 O) through the late Pleistocene in the Brazilian Intertropical Region
We inferred the annual isotopic diet (δ 13 C) of an individual of the giant ground sloth Eremotherium laurillardi found in Toca dos Ossos (Ourolândia, Bahia, Brazil) through the extension of its third inferior molar. This individual lived in the region at 40,779–39,617cal yr BP. One year of its life was recorded in a length of 67 mm in the tooth. Two years were recorded in this molariform, during which the diet and climate did not change much, an…
Interrelation of radiocarbon ages from bone fractions in the Brazilian Intertropical Region
There is a consensus in the literature that radiocarbon dating performed on bioapatite often produces ages younger than dating performed on collagen. We propose a general regression that could be used to convert the bioapatite radiocarbon ages to the simulated ages on collagen in fossil samples worldwide. This general regression presents several good indices of quality, high correlation ( R 2 = 0.98), lower values of percent predicted error (%PE …
Late Pleistocene mammals from northeastern Brazil caves
First AMS radiocarbon dating of Río Chico style paintings (southernmost Patagonia, Argentina)
Annual isotopic diet (δ13C, δ18O) of Notiomastodon platensis (Ameghino, 1888) from Brazilian Intertropical Region
Radiocarbon Dating of St. George’s Rotunda in Nitrianska Blatnica (Slovakia)
An international consortium of radiocarbon ( 14 C) laboratories was established to date the origin of the St. George’s Rotunda in Nitrianska Blatnica (Slovakia), because its age was not well established in previous investigations. Altogether, 20 samples of wood, charcoal, mortar and plaster were analyzed. The 14 C results obtained from the different laboratories as well as between the different sample types were in good agreement, resulting in a …
Historical context in the light of science research (based on materials from the 2007 excavations in the Moscow Kremlin by the Institute of Archaeology RAS)
Late Quaternary (≥MIS 3 to MIS 1) stratigraphic transitions in a highland Beringian landscape along the Kuskokwim River, Alaska
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 K…
Findings from an in-Depth Annual Tree-Ring Radiocarbon Intercomparison
The radiocarbon ( 14 C) calibration curve so far contains annually resolved data only for a short period of time. With accelerator mass spectrometry (AMS) matching the precision of decay counting, it is now possible to efficiently produce large datasets of annual resolution for calibration purposes using small amounts of wood. The radiocarbon intercomparison on single-year tree-ring samples presented here is the first to investigate specifically …
The Extermination of the Ancient Russian City of Yaroslavl at the Beginning of the 13th Century
This paper raises methodological issues of radiocarbon ( 14 C) dating of historical events based on data obtained during the excavations of the Russian medieval city of Yaroslavl. The city is of special interest to our study because of the precise time of its destruction by troops of Batu Khan mentioned in chronicles—the winter of 1238. To date in Yaroslavl, researchers have discovered 9 mass burials of citizens and domestic animals buried someti…
Hallazgos cerámicos y su cronología en el área comprendida entre el extremo sur del macizo del deseado y la cuenca del Río Santa Cruz (Patagonia Sur, Argentina)
El objetivo de este trabajo es informar sobre la recuperación de seis tiestos en el área ubicada entre el extremo sur del Macizo del Deseado y el río Santa Cruz. Si bien se trata de un registro arqueológico poco abundante, constituye un aporte significativo al conocimiento sobre el uso de esta tecnología entre grupos cazadores-recolectores en estas latitudes y en espacios intermedios entre la costa y la cordillera. Se presenta la información cron…
Radiocarbon Dating of Medieval Buildings in the Mountainous Part of Ingushetia (Northern Caucasus, Russia)
There are hundreds of preserved medieval buildings in the mountainous part of Ingushetia, including Christian churches, crypts, temples, sanctuaries, battle towers, and living buildings. The chronology of their construction period is still questioned, as there are no radiocarbon ( 14 C) dates published for these buildings and their dating is mainly based on architectural features, a few historical sources, and sometimes on accompanying archaeolog…
Radiocarbon Dating of Mortar from the Aqueduct in Skopje
The Aqueduct is one of the city landmarks of Skopje, Republic of North Macedonia. It was part of a water-supply system, with a total original length of about 10 km, while its surface remains are about 385 m long. The age of the Aqueduct is not known—several hypotheses place it to periods between the 6th and 16th centuries. Six mortar samples from different positions of the eastern façade were taken for radiocarbon ( 14 C) dating. In order to extr…
Radiocarbon Pretreatment Comparisons of Bald Cypress ( Taxodium Distichum ) wood samples from a massive buried deposit on the Georgia Coast, USA
We sampled individual growth rings from three ancient remnant bald cypress ( Taxodium distichum ) trees from a massive buried deposit at the mouth of the Altamaha River on the Georgia Coast to determine the best technique for radiocarbon ( 14 C) dating pretreatment. The results of our comparison of traditional ABA pretreatment and holocellulose and α-cellulose fractions show no significant differences among the pretreatments ( 14 C tree-ring chro…
Radiocarbon in Marsh Periwinkle ( Littorina Irrorata ) Conchiolin
In coastal and island archaeology, carbonate mollusk shells are often among the most abundant materials available for radiocarbon ( 14 C) dating. The marsh periwinkle ( Littorina irrorata ) is one of these such species, ubiquitously found along the Atlantic and Gulf coasts of the United States in both modern and archaeological contexts. This paper presents a novel approach to dating estuarine mollusks where rather than attempting to characterize …
Effect of Beam Transmission of Stable Isotopes on Online δ 13 C for SSAMS
It is known that 12 C beam transmission through the accelerator decreases at high beam currents. This effect depends on machine design and varies across different types of AMS instruments. For beam currents of about 100 μA, the effect is small on the 500 kV tandem CAMS unit, whereas beam saturation is observed for similar high beam currents on the 250 kV SSAMS unit. While this effect is very evident for high 12 C beam currents, we have also obser…
Pigments, binders, and ages of rock art at Viuda Quenzana, Santa Cruz, Patagonia (Argentina)
Carbon Isotopes (δ 13 C and Δ 14 C) in Shell Carbonate, Conchiolin, and Soft Tissues in Eastern Oyster ( Crassostrea Virginica)
Biogeochemical analyses of eastern oysters ( Crassostrea virginica ) are frequently included in environmental monitoring and paleoecological studies because their shells and soft tissues record environmental and dietary signals. Carbon isotopes in the mineral phase of the shell are derived from ambient bicarbonate and dissolved inorganic carbon (DIC), while organic carbon present in soft tissue is of dietary origin. Mineral-bound organic matter w…
Carbon and Oxygen Isotope Composition in Soil Carbon Dioxide and Free Oxygen within Deep Ultisols at the Calhoun CZO, South Carolina, USA
In order to evaluate effects of three land uses on isotopic compositions of CO 2 and O 2 of soil air to 5 m soil depth, a field study was conducted in the Calhoun Critical Zone Observatory, located in the subtropical climate of the Southern Piedmont of South Carolina, USA. Soil gas reservoirs were installed in ecosystems with three different land uses, each replicated three times: (i) reference hardwood stands that were never cultivated; (ii) cur…
The temporality of shell-bearing landscapes at Crystal River, Florida
Can We Get a Good Radiocarbon Age from “Bad Bone”? Determining the Reliability of Radiocarbon Age from Bioapatite
The study of the radiocarbon age of bone bioapatite was initiated by necessity to date archaeological artifacts, which often contain little or no collagen as a result of poor preservation. Contamination of the organic fraction in the process of the burial or during museum preservation treatment generally prohibits the use of the collagen fraction for dating. Our investigation has shown that the pretreatment of bone with diluted acetic acid follow…
Bayesian Approach to 14 C Dates for Estimation of Long-Term Archaeological Sequences in Arid Environments
Caves and rockshelters are critical loci for the analysis and understanding of human trajectories in the past. Use and re-uses of the same context, however, might have had serious impacts on depositional aspects. This is particularly true for the archaeological history of desert environments, such as the central Sahara, where most of the deposits are made of loose sand, rich in organic matter. Besides traditional stratigraphic reconstructions and…
C Variations in Pre-Bomb Nearshore Habitats of the Florida Panhandle, USA
This article presents radiocarbon data for known-age, pre-bomb marine gastropods, Busycon sinistrum and Strombus alatus , collected between AD 1924 and 1946 from nearshore environments of the Florida Panhandle, on the northern Gulf of Mexico. Δ 14 C was measured in whole crushed juvenile specimens ( n = 7) and terminal edges of adult specimens ( n = 6). A subsample of adult specimens ( n = 3) was subjected to additional, intrashell sampling to ob…
Findings from an in-Depth Annual Tree-Ring Radiocarbon Intercomparison
The radiocarbon ( 14 C) calibration curve so far contains annually resolved data only for a short period of time. With accelerator mass spectrometry (AMS) matching the precision of decay counting, it is now possible to efficiently produce large datasets of annual resolution for calibration purposes using small amounts of wood. The radiocarbon intercomparison on single-year tree-ring samples presented here is the first to investigate specifically …
Spatiotemporal Variability in ΔR in the Northern Gulf of Mexico, USA
Strombus alatus and Busycon sinistrum are large marine gastropods that are frequently recovered from archaeological contexts in southeastern North America. We previously proposed a reservoir age offset (ΔR) for B. sinistrum from the northern Gulf of Mexico region based on known-age pre-bomb 20th-century specimens. We also reported significant variability in radiocarbon both among and within S. alatus specimens, which precluded a reliable estimati…
Variation in Radiocarbon Age Determinations from the Crystal River Archaeological Site, Florida
Archaeologists interested in radiocarbon dating shell midden sites express concern regarding the accuracy of shell dates and how such determinations should be interpreted. This article discusses the problem of dating shells from sites in the southeastern United States. New results are presented comparing shell, bone, and soil-charcoal age determinations from the Crystal River site, located along the west-central Gulf Coast of Florida. Crystal Riv…
Carbon Reservoir Effects in Eastern Oyster from Apalachicola Bay, USA
Eastern oyster ( Crassostrea virginica ) is an ubiquitous estuarine shellfish taxon in eastern North America and one of the most abundant materials available for radiocarbon ( 14 C) dating. We examine spatiotemporal variability in carbon reservoir effects among pre-bomb oysters from Apalachicola Bay, USA, a river-influenced estuary on the northern Gulf of Mexico. Shells were sampled at multiple points along the valve to produce time-series record…
Maritime Hunter-Gatherers in the Chonos Archipelago (43°50’–46°50’ S), Western Patagonian Channels
This article presents the current advances in archeological research on the Western Patagonian Channels, specifically the Chonos Archipelago (43°50’–46°50’ S). Based on a large spatial scale, we aim to contribute to the discussion of the dispersion and characteristics of the occupation of the Pacific coast of southernmost South America. Results show that all of the contexts recorded do not exceed 3600 cal BP. Site formation processes that may hav…
Radiocarbon and Luminescence Age Determinations on Mounds at Crystal River and Roberts Island, Florida, USA
Optically stimulated luminescence (OSL) has been employed successfully to determine the ages of palaeosols from earthen mounds in the southeastern USA, providing archaeologists with a means of dating monument construction in the absence of carbonaceous materials and geologists with a setting for understanding factors that can affect the luminescence intensity (i.e., burial dose) of soils. However, OSL dating has not been adequately tested on moun…
Pigments, binders, and ages of rock art at Viuda Quenzana, Santa Cruz, Patagonia (Argentina)
Carbon Isotopes (δ 13 C and Δ 14 C) in Shell Carbonate, Conchiolin, and Soft Tissues in Eastern Oyster ( Crassostrea Virginica)
Biogeochemical analyses of eastern oysters ( Crassostrea virginica ) are frequently included in environmental monitoring and paleoecological studies because their shells and soft tissues record environmental and dietary signals. Carbon isotopes in the mineral phase of the shell are derived from ambient bicarbonate and dissolved inorganic carbon (DIC), while organic carbon present in soft tissue is of dietary origin. Mineral-bound organic matter w…
Dated evidence of the interaction between humans and megafauna in the late Pleistocene of Sergipe state, northeastern Brazil
Bioapatite 14 C Age of Giant Mammals from Brazil
We investigated the radiocarbon age and stable isotope composition of bioapatite from bone, enamel, and dentine material from 3 different species of extinct mammals in South America. Most samples of Eremotherium laurillardi, Toxodon platensis , and Notiomastodon platensis were collected in natural depressions located in the northeastern Brazilian provinces of Sergipe, Bahia, and Rio Grande do Norte. All samples studied were devoid of collagen, wh…
Radiocarbon in Marsh Periwinkle ( Littorina Irrorata ) Conchiolin
In coastal and island archaeology, carbonate mollusk shells are often among the most abundant materials available for radiocarbon ( 14 C) dating. The marsh periwinkle ( Littorina irrorata ) is one of these such species, ubiquitously found along the Atlantic and Gulf coasts of the United States in both modern and archaeological contexts. This paper presents a novel approach to dating estuarine mollusks where rather than attempting to characterize …
Compatibility of Atmospheric 14 CO 2 Measurements
Combining atmospheric Δ 14 CO 2 data sets from different networks or laboratories requires secure knowledge on their compatibility. In the present study, we compare Δ 14 CO 2 results from the Heidelberg low-level counting (LLC) laboratory to 12 international accelerator mass spectrometry (AMS) laboratories using distributed aliquots of five pure CO 2 samples. The averaged result of the LLC laboratory has a measurement bias of –0.3±0.5‰ with respe…
Estimation of the Radiocarbon Reservoir Effect, Snake River Basin, Northwestern North America
Many archaeological sites along coastlines and rivers contain large quantities of marine and riverine bivalve shell. Often shell is the only datable organic material available to determine radiocarbon age estimates of features and to build regional chronologies. Shell is difficult to date accurately because of reservoir effects, and archaeologists have avoided it despite its abundance. If reservoir effects are understood, shell can provide accura…
Radiocarbon Dating of Mortar from the Aqueduct in Skopje
The Aqueduct is one of the city landmarks of Skopje, Republic of North Macedonia. It was part of a water-supply system, with a total original length of about 10 km, while its surface remains are about 385 m long. The age of the Aqueduct is not known—several hypotheses place it to periods between the 6th and 16th centuries. Six mortar samples from different positions of the eastern façade were taken for radiocarbon ( 14 C) dating. In order to extr…
The New 250kV Single Stage AMS System at Cais, University of Georgia
A new 250kV single stage AMS accelerator (SSAMS) was installed at the Center for Applied Isotope Studies, University of Georgia. The accelerator is intended to be used primarily for radiocarbon measurements of natural and biobased samples, while all other samples such as marine, geological, atmospheric and archaeological samples are measured on the decade-old 500kV compact tandem accelerator (CAMS). The new AMS system is equipped with a 134-catho…
Paleodietary studies on bioapatite of the inhabitants of the northern Patagonian Archipelago of Chile from the late Holocene to European contact
Comparing Bioapatite and Collagen Radiocarbon Dates From a 16th Century Cemetery Context—el Japón, Xochimilco, Mexico City
El Japón is a 16th century hamlet site in the marshlands of the southern Basin of Mexico in central Mesoamerica. Radiocarbon ( 14 C) dating and OxCal modeling of human bone collagen (n = 11) identifies a range of burials at El Japón cemetery from 1550–1650 cal. CE. The refined chronology identifies use of this rural settlement well after the onset of colonial government-sponsored relocation of Indigenous people to larger settlements (congregacion…
Radiocarbon Dating of Medieval Buildings in the Mountainous Part of Ingushetia (Northern Caucasus, Russia)
There are hundreds of preserved medieval buildings in the mountainous part of Ingushetia, including Christian churches, crypts, temples, sanctuaries, battle towers, and living buildings. The chronology of their construction period is still questioned, as there are no radiocarbon ( 14 C) dates published for these buildings and their dating is mainly based on architectural features, a few historical sources, and sometimes on accompanying archaeolog…
Radiocarbon Pretreatment Comparisons of Bald Cypress ( Taxodium Distichum ) wood samples from a massive buried deposit on the Georgia Coast, USA
We sampled individual growth rings from three ancient remnant bald cypress ( Taxodium distichum ) trees from a massive buried deposit at the mouth of the Altamaha River on the Georgia Coast to determine the best technique for radiocarbon ( 14 C) dating pretreatment. The results of our comparison of traditional ABA pretreatment and holocellulose and α-cellulose fractions show no significant differences among the pretreatments ( 14 C tree-ring chro…
Radiocarbon Variation in Charcoal/Wood and Soil Fractions from a Loessic Setting in Central Alaska
The Healy’s Lucky Strike site in central Alaska has an exceptional Holocene loess-paleosol sequence that has afforded us the ability to look at variation in 14 C dating of soil organic matter (SOM) fractions in a high-latitude loess setting. Our work has focused on comparing the radiocarbon ages of charcoal and wood to base-soluble humic acids (HA) and base-insoluble soil residue (SR) fractions from bulk soil samples. Charcoal/wood ages were youn…
Radiocarbon Age of Soil Organic Matter Fractions Buried by Tephra in Alaska
Radiocarbon ages were determined on different fractions extracted from buried paleosols in south-central Alaska as an experiment to establish best practices for analysis of low-organic-matter paleosols. Seven samples were collected from directly beneath tephra deposits to determine the eruption frequency of Mount Spurr Volcano, Alaska. Soil development near the volcano is poor due to the high-latitude climate and frequent burial of soil surfaces …
Participants
From the 14th International Radiocarbon Conference held in Tucson, AZ, May 20-24, 1991
Glacier variations, mudflow activity and landscape development in the Aksay Valley (Tian Shan) during the late Holocene
The object of this paper is to reconstruct the history of glaciation and the dynamics of mudflow activity as part of the development of landscapes in the Aksay Valley, Kirgizsky Ridge, over the last 2000 years. Glacial, mudflow and slope deposits were dated by lichenometry and the radiocarbon method. The results of 14C dating of buried soils shows that at about 1700 BP a period of activization of slope processes took place in the valley. The zone…
Harold W. Krueger (1935–1997)
at the age of 62, losing a three-year battle with cancer
Conference Participants
From the 16th International Radiocarbon Conference held in Gronigen, Netherlands, June 16-20, 1997
A multistory gigantic subaerial debris flow in an active fault scarp in NW Anatolia, Turkey
Mass instability in the uplifting footwall blocks of normal faults involves a range of regional and local factors including, among others, climatic setting, topography, lithology and particularly ground shaking during earthquakes. Morphological and sedimentological investigations backed by 14 C dating on a huge debris flow and its zone of depreciation provided favorable insights for dynamics and causative factors of this mass wasting. Our observa…
Absolute Dating of Monoxylous Boats from Northern Italy
Twelve monoxylous boats were analyzed from different provinces of northern Italy by radiocarbon and dendrodating. Most of them were dated in the range 6th–12th centuries cal AD. All boats were made from single tree trunks containing ~50 to ~250 tree rings. The results from archaeometric dating in logboats confirm that these kinds of vessels remained practically unchanged for centuries and were in use until recently. The technical features are mor…
Can We Get a Good Radiocarbon Age from “Bad Bone”? Determining the Reliability of Radiocarbon Age from Bioapatite
The study of the radiocarbon age of bone bioapatite was initiated by necessity to date archaeological artifacts, which often contain little or no collagen as a result of poor preservation. Contamination of the organic fraction in the process of the burial or during museum preservation treatment generally prohibits the use of the collagen fraction for dating. Our investigation has shown that the pretreatment of bone with diluted acetic acid follow…
Status of the AMS facility at the University of Georgia
C Ages of Bone Fractions from Armenian Prehistoric Sites
Prehistoric cultures in Armenia are still poorly known; thus, accelerator mass spectrometry (AMS) radiocarbon dates are invaluable in constructing an accurate chronology. Bone samples have been collected from sites representing the Middle Paleolithic, Chalcolithic, and Early Bronze periods. Most of the bone samples are poorly preserved. We describe the separation technique for the extraction of both the bioapatite and collagen fractions. In many …
Paleoecology and radiocarbon dating of the Pleistocene megafauna of the Brazilian Intertropical Region
During the Pleistocene a fauna composed of large (biomass > 44 kg) and giant mammals (biomass > 1000 kg) that are usually associated with open environments lived in the Brazilian Intertropical Region. We present here new information concerning the paleoecology and chronology of some species of this megafauna. Carbon isotope analyses were performed for a better understanding of the paleoecology of the species Eremotherium laurillardi (Lund, 1842),…
Bayesian Approach to 14C Dates for Estimation of Long-Term Archaeological Sequences in Arid Environments
Caves and rockshelters are critical loci for the analysis and understanding of human trajectories in the past. Use and re-uses of the same context, however, might have had serious impacts on depositional aspects. This is particularly true for the archaeological history of desert environments, such as the central Sahara, where most of the deposits are made of loose sand, rich in organic matter. Besides traditional stratigraphic reconstructions and…
The New 250kV Single Stage AMS System at Cais, University of Georgia
A new 250kV single stage AMS accelerator (SSAMS) was installed at the Center for Applied Isotope Studies, University of Georgia. The accelerator is intended to be used primarily for radiocarbon measurements of natural and biobased samples, while all other samples such as marine, geological, atmospheric and archaeological samples are measured on the decade-old 500kV compact tandem accelerator (CAMS). The new AMS system is equipped with a 134-catho…
Bioapatite 14C Age of Giant Mammals from Brazil
We investigated the radiocarbon age and stable isotope composition of bioapatite from bone, enamel, and dentine material from 3 different species of extinct mammals in South America. Most samples of Eremotherium laurillardi, Toxodon platensis, and Notiomastodon platensis were collected in natural depressions located in the northeastern Brazilian provinces of Sergipe, Bahia, and Rio Grande do Norte. All samples studied were devoid of collagen, whi…
Bioapatite 14 C Age of Giant Mammals from Brazil
We investigated the radiocarbon age and stable isotope composition of bioapatite from bone, enamel, and dentine material from 3 different species of extinct mammals in South America. Most samples of Eremotherium laurillardi, Toxodon platensis , and Notiomastodon platensis were collected in natural depressions located in the northeastern Brazilian provinces of Sergipe, Bahia, and Rio Grande do Norte. All samples studied were devoid of collagen, wh…
Bayesian Approach to 14 C Dates for Estimation of Long-Term Archaeological Sequences in Arid Environments
Caves and rockshelters are critical loci for the analysis and understanding of human trajectories in the past. Use and re-uses of the same context, however, might have had serious impacts on depositional aspects. This is particularly true for the archaeological history of desert environments, such as the central Sahara, where most of the deposits are made of loose sand, rich in organic matter. Besides traditional stratigraphic reconstructions and…
Radiocarbon dating and stable isotopes analyses of Caiman latirostris (Daudin, 1801) (Crocodylia, Alligatoridae) from the late Pleistocene of Northeastern Brazil, with comments on spatial distribution…
Dated evidence of the interaction between humans and megafauna in the late Pleistocene of Sergipe state, northeastern Brazil
Variation in Radiocarbon Age Determinations from the Crystal River Archaeological Site, Florida
Archaeologists interested in radiocarbon dating shell midden sites express concern regarding the accuracy of shell dates and how such determinations should be interpreted. This article discusses the problem of dating shells from sites in the southeastern United States. New results are presented comparing shell, bone, and soil-charcoal age determinations from the Crystal River site, located along the west-central Gulf Coast of Florida. Crystal Riv…
Radiocarbon Chronology of the Tlatoani Site at Tlayacapan, Morelos, Mexico
The archaeological site of Tlatoani at Tlayacapan is located in the Mexican Highlands, in the present-day state of Morelos. The site is an extant settlement located at the top of the Tepoztlan mountain range, and has been occupied since the Late Preclassic period (AD 150–500). At the height of its occupation in the Epiclassic and Early Postclassic periods (AD 600–1150), Tlayacapan was situated on the top of the hill. The radiocarbon investigation…
Estimation of the Radiocarbon Reservoir Effect, Snake River Basin, Northwestern North America
Many archaeological sites along coastlines and rivers contain large quantities of marine and riverine bivalve shell. Often shell is the only datable organic material available to determine radiocarbon age estimates of features and to build regional chronologies. Shell is difficult to date accurately because of reservoir effects, and archaeologists have avoided it despite its abundance. If reservoir effects are understood, shell can provide accura…
Maritime Hunter-Gatherers in the Chonos Archipelago (43°50’–46°50’ S), Western Patagonian Channels
This article presents the current advances in archeological research on the Western Patagonian Channels, specifically the Chonos Archipelago (43°50’–46°50’ S). Based on a large spatial scale, we aim to contribute to the discussion of the dispersion and characteristics of the occupation of the Pacific coast of southernmost South America. Results show that all of the contexts recorded do not exceed 3600 cal BP. Site formation processes that may hav…
Stable isotope analysis on human remains from the final Early Holocene in the southern Puna of Argentina
In this work are presented the results of isotopic analyses made on bone remains of human individuals (n = 6) from the southern Puna of Argentina dated to the final Early Holocene (ca. 8230–8000 BP). They were found in structures located in Peñas de las Trampas 1.1, a rockshelter at 3582 m.a.s.l. in Antofagasta de la Sierra, in the southern Argentinian Puna. They contain multiple secondary burials. Bone fragments were recovered from at least six …
Radiocarbon and Luminescence Age Determinations on Mounds at Crystal River and Roberts Island, Florida, USA
Optically stimulated luminescence (OSL) has been employed successfully to determine the ages of palaeosols from earthen mounds in the southeastern USA, providing archaeologists with a means of dating monument construction in the absence of carbonaceous materials and geologists with a setting for understanding factors that can affect the luminescence intensity (i.e., burial dose) of soils. However, OSL dating has not been adequately tested on moun…
C Variations in Pre-Bomb Nearshore Habitats of the Florida Panhandle, USA
This article presents radiocarbon data for known-age, pre-bomb marine gastropods, Busycon sinistrum and Strombus alatus , collected between AD 1924 and 1946 from nearshore environments of the Florida Panhandle, on the northern Gulf of Mexico. Δ 14 C was measured in whole crushed juvenile specimens ( n = 7) and terminal edges of adult specimens ( n = 6). A subsample of adult specimens ( n = 3) was subjected to additional, intrashell sampling to ob…
Comparative Dendrochronological and 14 C Dating of 15th Century Russian Icon
A 15th century Russian icon from the Novgorod region was analyzed using both dendrochronological and radiocarbon methods [liquid scintillation counting (LSC) and accelerator mass spectrometry (AMS)]. This orthodox icon represents the Mother of God (Dexiokratusa). Fine art experts attribute the icon to between the late 14th to the early 15th centuries. The last complete tree ring was dated to AD 1409. There are indications that the trees were cut …
Radiocarbon dating (46 obras) · Geology (43 obras) · Archaeology and ancient environmental studies (37 obras) · Archaeology (36 obras) · Geography (36 obras) · Paleontology (35 obras) · Geology and Paleoclimatology Research (21 obras) · Pleistocene-Era Hominins and Archaeology (20 obras) · Isotope Analysis in Ecology (18 obras) · Holocene (15 obras)