The research aims to reconstruct the chronology of building the Southwest Church, Umm el-Jimal, Jordan by AMS radiocarbon dating organic inclusions uncovered from the mortars collected from the floor of the church, seat of the apse and the base of the north wall. It sheds light on the major aspects of mortar recipes at the time of their production. Samples were examined macroscopically with magnifying lenses and characterized using archaeometric techniques of optical microscopy and X-ray diffraction. The radiocarbon dates showed that 594–643 AD is the most probable age for flooring and plastering the church and 995–1154 AD is the earliest possible date for its final collapse. The preparatory layers of the church floor were laid on an older one, probably of a yard, and its north wall was raised on an older base, both most probably date to the late fifth–early sixth century AD. The production recipe of the mortars is made from a lime binder and inclusions mainly of organic (charcoal) and inorganic (quartz, grog, volcanics). The mortars have the same recipe regardless their bedding and jointing functions which remained unchanged during the building stages of church complex.
这项研究旨在通过对从教堂地面、天顶和北墙基座采集的灰泥中发现的有机夹杂物进行 AMS 放射性碳测年，重建约旦乌姆吉马尔西南教堂的建造年代。它揭示了当时灰泥配方的主要方面。用放大镜对样品进行了宏观检查，并使用光学显微镜和 X 射线衍射考古技术对样品进行了鉴定。放射性碳年代测定结果表明，公元 594-643 年是教堂铺设地板和抹灰的最可能年代，而公元 995-1154 年则是教堂最终倒塌的最早可能年代。教堂地面的预备层铺设在一个较旧的地面上，可能是一个院子的地面，教堂的北墙是在一个较旧的基座上加高的，两者都很可能是公元五世纪末至六世纪初的作品。灰泥的制作配方是由石灰粘合剂和主要由有机物（木炭）和无机物（石英、格罗格、火山岩）组成的夹杂物。灰泥的配方相同，但其垫层和连接功能在教堂建筑群的建造阶段保持不变。
{"title":"RECONSTRUCTING THE CHRONOLOGY OF BUILDING THE SOUTHWEST CHURCH OF UMM EL-JIMAL, JORDAN BY AMS RADIOCARBON DATING OF MORTAR AND PLASTER","authors":"Khaled Al-Bashaireh","doi":"10.1017/rdc.2024.11","DOIUrl":"https://doi.org/10.1017/rdc.2024.11","url":null,"abstract":"The research aims to reconstruct the chronology of building the Southwest Church, Umm el-Jimal, Jordan by AMS radiocarbon dating organic inclusions uncovered from the mortars collected from the floor of the church, seat of the apse and the base of the north wall. It sheds light on the major aspects of mortar recipes at the time of their production. Samples were examined macroscopically with magnifying lenses and characterized using archaeometric techniques of optical microscopy and X-ray diffraction. The radiocarbon dates showed that 594–643 AD is the most probable age for flooring and plastering the church and 995–1154 AD is the earliest possible date for its final collapse. The preparatory layers of the church floor were laid on an older one, probably of a yard, and its north wall was raised on an older base, both most probably date to the late fifth–early sixth century AD. The production recipe of the mortars is made from a lime binder and inclusions mainly of organic (charcoal) and inorganic (quartz, grog, volcanics). The mortars have the same recipe regardless their bedding and jointing functions which remained unchanged during the building stages of church complex.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"79 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140007651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Karin Nemoto, Yusuke Yokoyama, Satoshi Horiike, Stephen P Obrochta, Yosuke Miyairi
At the Intertropical Convergence Zone (ITCZ), the northern and southern Tradewinds converge, and this region is characterized by low atmospheric pressure and high precipitation. The climate in the Timor Sea is characterized by seasonal precipitation changes driven by meridional migrations of the ITCZ and the monsoonal front. The ITCZ shifts in response to changes in the thermal balance between the northern and southern hemispheres. Thus, reconstruction of paleo-precipitation in the Timor Sea is expected to reveal past changes in both regional and global climate, the latter through inference of the ITCZ position. To reconstruct paleo-precipitation in the Timor Sea, we performed extensive radiocarbon analysis on both planktonic foraminifera and total organic carbon (TOC), which is derived from terrestrial and marine sources. Increased precipitation enhances the fraction of relatively old, terrestrial carbon to the core site, which in turn increases the difference between the ages of TOC and planktonic foraminifera. Variations in radiocarbon ages reveal that during northern hemisphere cooling intervals such as Heinrich Stadial 1 and the Younger Dryas, the ITCZ was in a southern position, thus increasing precipitation in the Timor Sea. However, the Timor Sea was dryer during the Bølling–Allerød warming as the ITCZ shifted northward.
{"title":"MERIDIONAL MIGRATIONS OF THE INTERTROPICAL CONVERGENCE ZONE DURING THE LAST DEGLACIATION IN THE TIMOR SEA DETECTED BY EXTENSIVE RADIOCARBON DATING","authors":"Karin Nemoto, Yusuke Yokoyama, Satoshi Horiike, Stephen P Obrochta, Yosuke Miyairi","doi":"10.1017/rdc.2024.13","DOIUrl":"https://doi.org/10.1017/rdc.2024.13","url":null,"abstract":"At the Intertropical Convergence Zone (ITCZ), the northern and southern Tradewinds converge, and this region is characterized by low atmospheric pressure and high precipitation. The climate in the Timor Sea is characterized by seasonal precipitation changes driven by meridional migrations of the ITCZ and the monsoonal front. The ITCZ shifts in response to changes in the thermal balance between the northern and southern hemispheres. Thus, reconstruction of paleo-precipitation in the Timor Sea is expected to reveal past changes in both regional and global climate, the latter through inference of the ITCZ position. To reconstruct paleo-precipitation in the Timor Sea, we performed extensive radiocarbon analysis on both planktonic foraminifera and total organic carbon (TOC), which is derived from terrestrial and marine sources. Increased precipitation enhances the fraction of relatively old, terrestrial carbon to the core site, which in turn increases the difference between the ages of TOC and planktonic foraminifera. Variations in radiocarbon ages reveal that during northern hemisphere cooling intervals such as Heinrich Stadial 1 and the Younger Dryas, the ITCZ was in a southern position, thus increasing precipitation in the Timor Sea. However, the Timor Sea was dryer during the Bølling–Allerød warming as the ITCZ shifted northward.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"74 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140007601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marine Wojcieszak, Laurent Fontaine, Jan Elsen, Roald Hayen, Alexander Lehouck, Mathieu Boudin
Since the first developments of anthropogenic lime materials radiocarbon (14C) dating in the 1960s, numerous studies have been undertaken and developed to investigate the topic further. Historic mortars are complex composite and open system materials that can incorporate a large range of components. Due to the complexity of the historic lime mortars composition, they are not part of a routine protocol in most radiocarbon laboratories and reliable dating is not always achieved. A thorough characterization needs to be performed and different preparation methods can be considered as a function of their compositions. A vast range of terms are employed to qualify the lime mortars components and alterations that can possibly have an influence on the dating result. Here, a detailed description of these components and the various terms used is listed. To illustrate this, images obtained by thin-section petrography and cathodoluminescence are presented in addition to radiocarbon results using stepwise acid hydrolysis on Belgian mortars having different provenance, state, age and composition. Depending on the type of aggregate used, the type of binder and its conservation state, the eventual presence of weathering carbonates and the assumed speed of the carbonation process, the reliability of radiocarbon measurements using the stepwise acid hydrolysis technique is discussed and confronted with presumed historical constraints.
{"title":"HISTORIC LIME MORTARS COMPOSITION AND TERMINOLOGY FOR RADIOCARBON DATING—CASE STUDIES BASED ON THIN-SECTION PETROGRAPHY AND CATHODOLUMINESCENCE","authors":"Marine Wojcieszak, Laurent Fontaine, Jan Elsen, Roald Hayen, Alexander Lehouck, Mathieu Boudin","doi":"10.1017/rdc.2024.14","DOIUrl":"https://doi.org/10.1017/rdc.2024.14","url":null,"abstract":"Since the first developments of anthropogenic lime materials radiocarbon (<jats:sup>14</jats:sup>C) dating in the 1960s, numerous studies have been undertaken and developed to investigate the topic further. Historic mortars are complex composite and open system materials that can incorporate a large range of components. Due to the complexity of the historic lime mortars composition, they are not part of a routine protocol in most radiocarbon laboratories and reliable dating is not always achieved. A thorough characterization needs to be performed and different preparation methods can be considered as a function of their compositions. A vast range of terms are employed to qualify the lime mortars components and alterations that can possibly have an influence on the dating result. Here, a detailed description of these components and the various terms used is listed. To illustrate this, images obtained by thin-section petrography and cathodoluminescence are presented in addition to radiocarbon results using stepwise acid hydrolysis on Belgian mortars having different provenance, state, age and composition. Depending on the type of aggregate used, the type of binder and its conservation state, the eventual presence of weathering carbonates and the assumed speed of the carbonation process, the reliability of radiocarbon measurements using the stepwise acid hydrolysis technique is discussed and confronted with presumed historical constraints.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"1 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140007645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jennifer Birch, Sturt W Manning, John P Hart, Brita Lorentzen
Five sites in present-day New York have played important roles in archaeological narratives surrounding the development of settled village life in northeastern North America. Excavated in the mid-twentieth century, the Roundtop, Maxon-Derby, Sackett or Canandaigua, Bates, and Kelso sites include evidence related to the transition from semisedentary settlement-subsistence patterns during the twelfth through fourteenth centuries AD to those associated with fifteenth century and later settled Iroquoian villagers. Radiocarbon dates for each site were obtained early in the development of the method and again following the transition to AMS dating. Here, we present new or recently-published dates for these sites, combined with reliable existing dates in Bayesian models, including in some cases short tree-ring sequenced wiggle-matches on wood charcoal. Our results clarify the timing of each site’s occupation(s), revealing both continuity and discontinuity in the development of longhouse dwellings, sedentism, and the repeated re-use of some site locations over hundreds of years.
{"title":"EVALUATING THE TIMING OF EARLY VILLAGE DEVELOPMENT IN NEW YORK: MORE DATES FROM CLASSIC NEW YORK SITES","authors":"Jennifer Birch, Sturt W Manning, John P Hart, Brita Lorentzen","doi":"10.1017/rdc.2024.10","DOIUrl":"https://doi.org/10.1017/rdc.2024.10","url":null,"abstract":"Five sites in present-day New York have played important roles in archaeological narratives surrounding the development of settled village life in northeastern North America. Excavated in the mid-twentieth century, the Roundtop, Maxon-Derby, Sackett or Canandaigua, Bates, and Kelso sites include evidence related to the transition from semisedentary settlement-subsistence patterns during the twelfth through fourteenth centuries AD to those associated with fifteenth century and later settled Iroquoian villagers. Radiocarbon dates for each site were obtained early in the development of the method and again following the transition to AMS dating. Here, we present new or recently-published dates for these sites, combined with reliable existing dates in Bayesian models, including in some cases short tree-ring sequenced wiggle-matches on wood charcoal. Our results clarify the timing of each site’s occupation(s), revealing both continuity and discontinuity in the development of longhouse dwellings, sedentism, and the repeated re-use of some site locations over hundreds of years.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"1 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140007603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A V Petrozhitskiy, E V Parkhomchuk, M M Ignatov, D V Kuleshov, L A Kutnyakova, E S Konstantinov, V V Parkhomchuk
The AMS Golden Valley radiocarbon analysis laboratory is equipped with two accelerator mass spectrometers: AMS facility from Budker Institute of Nuclear Physics (BINP AMS) and MIni CArbon DAting System (MICADAS-28) from Ionplus AG and two graphitization systems: Automated Graphitization Equipment (AGE-3) from Ionplus AG and Absorption-catalytic setup developed in Boreskov Institute of Catalysis (ACS BIC). The laboratory provides routine 14C analyses of various samples: collagen, cellulose, humic acids, carbonates from sediments, etc. The main focus of the laboratory is to determine the age of archaeological artifacts by radiocarbon dating. This work presents a comprehensive description of the BINP AMS facility, with its operation compared with that of MICADAS in the same laboratory. In 2022, the AMS Golden Valley laboratory participated for the first time in the Glasgow International Radiocarbon Inter-comparison (GIRI). The samples were graphitized on the AGE-3 and subsequently measured in both AMS facilities. A comparison of the results of the two series of experiments, namely AGE-3 + MICADAS-28 and AGE-3 + BINP AMS, is given.
{"title":"COMPARATIVE FEATURES OF BINP AMS AND MICADAS FACILITIES WORKING AT AMS GOLDEN VALLEY, RUSSIA","authors":"A V Petrozhitskiy, E V Parkhomchuk, M M Ignatov, D V Kuleshov, L A Kutnyakova, E S Konstantinov, V V Parkhomchuk","doi":"10.1017/rdc.2024.4","DOIUrl":"https://doi.org/10.1017/rdc.2024.4","url":null,"abstract":"The AMS Golden Valley radiocarbon analysis laboratory is equipped with two accelerator mass spectrometers: AMS facility from Budker Institute of Nuclear Physics (BINP AMS) and MIni CArbon DAting System (MICADAS-28) from Ionplus AG and two graphitization systems: Automated Graphitization Equipment (AGE-3) from Ionplus AG and Absorption-catalytic setup developed in Boreskov Institute of Catalysis (ACS BIC). The laboratory provides routine <jats:sup>14</jats:sup>C analyses of various samples: collagen, cellulose, humic acids, carbonates from sediments, etc. The main focus of the laboratory is to determine the age of archaeological artifacts by radiocarbon dating. This work presents a comprehensive description of the BINP AMS facility, with its operation compared with that of MICADAS in the same laboratory. In 2022, the AMS Golden Valley laboratory participated for the first time in the Glasgow International Radiocarbon Inter-comparison (GIRI). The samples were graphitized on the AGE-3 and subsequently measured in both AMS facilities. A comparison of the results of the two series of experiments, namely AGE-3 + MICADAS-28 and AGE-3 + BINP AMS, is given.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"44 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140007644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P Ascough, N Bompard, M H Garnett, P Gulliver, C Murray, J-A Newton, C Taylor
The National Environmental Isotope Facility (NEIF) Radiocarbon Laboratory at the Scottish Universities Environmental Research Centre (SUERC) performs radiocarbon measurement of a wide range of sample matrices for applications in environmental research. Radiocarbon is applied to palaeoenvironmental, palaeoceanographic, and palaeoclimatic investigations, as well as work to understand the source, fate, turnover, and age of carbon in the modern carbon cycle. The NEIF Radiocarbon Laboratory supports users in the development and deployment of novel sampling techniques and laboratory approaches. Here, we give an overview of methods and procedures used by the laboratory to support the field collection, laboratory processing, and measurement of samples. This includes in-house development of novel and/or specialized methods and approaches, such as field collection of CO2 and CH4, hydropyrolysis, and ramped oxidation. The sample types covered include organic remains (e.g., plant material, peat, wood, charcoal, proteins), carbonates (e.g., speleothems, foraminifera, mollusc shell, travertine), waters (dissolved organic and inorganic carbon), gases (CO2 and CH4), soils and sediments (including sub-fractions).
{"title":"14C MEASUREMENT OF SAMPLES FOR ENVIRONMENTAL SCIENCE APPLICATIONS AT THE NATIONAL ENVIRONMENTAL ISOTOPE FACILITY (NEIF) RADIOCARBON LABORATORY, SUERC, UK","authors":"P Ascough, N Bompard, M H Garnett, P Gulliver, C Murray, J-A Newton, C Taylor","doi":"10.1017/rdc.2024.9","DOIUrl":"https://doi.org/10.1017/rdc.2024.9","url":null,"abstract":"The National Environmental Isotope Facility (NEIF) Radiocarbon Laboratory at the Scottish Universities Environmental Research Centre (SUERC) performs radiocarbon measurement of a wide range of sample matrices for applications in environmental research. Radiocarbon is applied to palaeoenvironmental, palaeoceanographic, and palaeoclimatic investigations, as well as work to understand the source, fate, turnover, and age of carbon in the modern carbon cycle. The NEIF Radiocarbon Laboratory supports users in the development and deployment of novel sampling techniques and laboratory approaches. Here, we give an overview of methods and procedures used by the laboratory to support the field collection, laboratory processing, and measurement of samples. This includes in-house development of novel and/or specialized methods and approaches, such as field collection of CO<jats:sub>2</jats:sub> and CH<jats:sub>4</jats:sub>, hydropyrolysis, and ramped oxidation. The sample types covered include organic remains (e.g., plant material, peat, wood, charcoal, proteins), carbonates (e.g., speleothems, foraminifera, mollusc shell, travertine), waters (dissolved organic and inorganic carbon), gases (CO<jats:sub>2</jats:sub> and CH<jats:sub>4</jats:sub>), soils and sediments (including sub-fractions).","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"87 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139754322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Radiocarbon (F14C) and stable carbon (δ13C) values were measured in single grains of spring barley (Hordeum vulgare L.) from the sample archive from two adjacent sites of the Long-term Experiments (LTEs) Hoosfield Spring Barley at Rothamsted Research (Harpenden, Hertfordshire, UK), covering the growing periods (March to September) of 1852 to 2020. F14C data of the barley grain confirm that recent values are approaching and will decline below the “nominal” F14C value of 1, tracking a similar decrease reported in other studies. Importantly, the measured δ13C values reveal a different temporal decline over the pre-bomb and post-bomb timescale. Detailed statistical analysis of δ13C data along with δ13C analysis of independent, archived barley mash samples, verifies and quantifies the extent and rate of this decline. Evidence presented from the barley grain and barley mash samples suggests a clear breakpoint in δ13C data occurring in 1995, where the rate of change alters, in that the slope in δ13C data for the pre-1995 period is declining at 1.4‰ per century, and the slope in δ13C for the post-1995 period is declining at 3.6‰ per century. Such a consistent shift in δ13C data could be used with F14C values to extend the use of the bomb peak for forensic, ecological, and environmental applications.
{"title":"CARBON ISOTOPE CHANGES THROUGH THE RECENT PAST: F14C AND δ13C VALUES IN SINGLE BARLEY GRAIN FROM 1852 TO 2020","authors":"E Dunbar, E M Scott, B G Tripney","doi":"10.1017/rdc.2024.8","DOIUrl":"https://doi.org/10.1017/rdc.2024.8","url":null,"abstract":"Radiocarbon (F<jats:sup>14</jats:sup>C) and stable carbon (δ<jats:sup>13</jats:sup>C) values were measured in single grains of spring barley <jats:italic>(Hordeum vulgare L.</jats:italic>) from the sample archive from two adjacent sites of the Long-term Experiments (LTEs) Hoosfield Spring Barley at Rothamsted Research (Harpenden, Hertfordshire, UK), covering the growing periods (March to September) of 1852 to 2020. F<jats:sup>14</jats:sup>C data of the barley grain confirm that recent values are approaching and will decline below the “nominal” F<jats:sup>14</jats:sup>C value of 1, tracking a similar decrease reported in other studies. Importantly, the measured δ<jats:sup>13</jats:sup>C values reveal a different temporal decline over the pre-bomb and post-bomb timescale. Detailed statistical analysis of δ<jats:sup>13</jats:sup>C data along with δ<jats:sup>13</jats:sup>C analysis of independent, archived barley mash samples, verifies and quantifies the extent and rate of this decline. Evidence presented from the barley grain and barley mash samples suggests a clear breakpoint in δ<jats:sup>13</jats:sup>C data occurring in 1995, where the rate of change alters, in that the slope in δ<jats:sup>13</jats:sup>C data for the pre-1995 period is declining at 1.4‰ per century, and the slope in δ<jats:sup>13</jats:sup>C for the post-1995 period is declining at 3.6‰ per century. Such a consistent shift in δ<jats:sup>13</jats:sup>C data could be used with F<jats:sup>14</jats:sup>C values to extend the use of the bomb peak for forensic, ecological, and environmental applications.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"81 3 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139754422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Magdalena Gómez-Puche, Javier Fernández-López de Pablo
The spread of trapeze industries (the creation of trapeze-shaped flint tips) during Late Mesolithic is one of the most disruptive phenomena of technological change documented in the European Prehistory. Understanding the chronological patterns of this process requires (i) a critical evaluation of stratigraphic relationship between trapeze assemblages and radiocarbon samples, and (ii) considering different levels of chronological uncertainty according to the inbuilt age of the samples and the calibration process. In this paper, we critically evaluate and analyze the radiocarbon record of the first trapeze industries in the Iberian Peninsula. A dataset of 181 radiocarbon dates from 67 sites dated to 8800–8200 cal BP was collected and evaluated following a strict data quality control protocol, from which 135 dates of 53 sites were retained and classified according to a reliability index. Then, three different phase Bayesian chronological models were created to estimate the duration of the first spread of trapezes across Iberia, considering different levels of chrono-stratigraphic resolution. We find that trapeze industries appeared in the eastern half of Iberia, over an area of 330,000 km2 between 8505–8390 and 8425–8338 cal BP, spanning 0–85 yr (95.4% CI). When the oldest evidence of trapezes from Portugal are considered, the probability distribution expands (8943–8457 and 8686–7688 cal BP), due to the chronological uncertainty of human samples with marine diet and regional ΔR values applied. For the eastern half of Iberia, the current evidence indicates a very rapid spread of trapeze industries initiated in the Central-Western Pyrenees, suggesting cultural diffusion within Mesolithic social networks as the main driving mechanism.
{"title":"SPATIOTEMPORAL PATTERNS ON THE APPEARANCE OF THE FIRST TRAPEZE INDUSTRIES IN THE LATE MESOLITHIC OF THE IBERIAN PENINSULA","authors":"Magdalena Gómez-Puche, Javier Fernández-López de Pablo","doi":"10.1017/rdc.2024.6","DOIUrl":"https://doi.org/10.1017/rdc.2024.6","url":null,"abstract":"The spread of trapeze industries (the creation of trapeze-shaped flint tips) during Late Mesolithic is one of the most disruptive phenomena of technological change documented in the European Prehistory. Understanding the chronological patterns of this process requires (i) a critical evaluation of stratigraphic relationship between trapeze assemblages and radiocarbon samples, and (ii) considering different levels of chronological uncertainty according to the inbuilt age of the samples and the calibration process. In this paper, we critically evaluate and analyze the radiocarbon record of the first trapeze industries in the Iberian Peninsula. A dataset of 181 radiocarbon dates from 67 sites dated to 8800–8200 cal BP was collected and evaluated following a strict data quality control protocol, from which 135 dates of 53 sites were retained and classified according to a reliability index. Then, three different phase Bayesian chronological models were created to estimate the duration of the first spread of trapezes across Iberia, considering different levels of chrono-stratigraphic resolution. We find that trapeze industries appeared in the eastern half of Iberia, over an area of 330,000 km<jats:sup>2</jats:sup> between 8505–8390 and 8425–8338 cal BP, spanning 0–85 yr (95.4% CI). When the oldest evidence of trapezes from Portugal are considered, the probability distribution expands (8943–8457 and 8686–7688 cal BP), due to the chronological uncertainty of human samples with marine diet and regional ΔR values applied. For the eastern half of Iberia, the current evidence indicates a very rapid spread of trapeze industries initiated in the Central-Western Pyrenees, suggesting cultural diffusion within Mesolithic social networks as the main driving mechanism.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"8 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139754484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Irka Hajdas, Giulia Guidobaldi, Negar Haghipour, Karin Wyss
Accurate radiocarbon (14C) analysis depends on a successful carbon separation relevant to the studied object. The process of 14C dating involves the following steps: characterization and sample choice, sample treatment, measurements, and evaluation of the results. Here, we provide an overview of conventional approaches to macromolecular samples and address specific issues such as detecting and removing contamination with roots, dolomite, and conservation products. We discuss the application of elemental analysis (%N, %C) in the preparation of bones and the infrared analysis in monitoring the contamination of samples. Our observations provide the basis for the discussions of the existing results and for planning the future sampling.
{"title":"SAMPLE SELECTION, CHARACTERIZATION AND CHOICE OF TREATMENT FOR ACCURATE RADIOCARBON ANALYSIS—INSIGHTS FROM THE ETH LABORATORY","authors":"Irka Hajdas, Giulia Guidobaldi, Negar Haghipour, Karin Wyss","doi":"10.1017/rdc.2024.12","DOIUrl":"https://doi.org/10.1017/rdc.2024.12","url":null,"abstract":"Accurate radiocarbon (<jats:sup>14</jats:sup>C) analysis depends on a successful carbon separation relevant to the studied object. The process of <jats:sup>14</jats:sup>C dating involves the following steps: characterization and sample choice, sample treatment, measurements, and evaluation of the results. Here, we provide an overview of conventional approaches to macromolecular samples and address specific issues such as detecting and removing contamination with roots, dolomite, and conservation products. We discuss the application of elemental analysis (%N, %C) in the preparation of bones and the infrared analysis in monitoring the contamination of samples. Our observations provide the basis for the discussions of the existing results and for planning the future sampling.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"254 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139754420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The radiocarbon (14C) dating method was applied to a survey of treasured items related to the ruins of the Imperial Residence in Anou, Nara Prefecture, which was one of the capitals of Japan during the 14th century. In this work, we dated two storage bags for Japanese musical instruments that are believed to be from the period of Emperor Go-Daigo who established the Southern Court. The 14C dating of these treasures proved that the musical instrument sacks are contemporaneous with the dating of the Imperial Residence ruins designated as an Important Cultural Property of Japan. In addition, there are limited surviving examples of silk fabrics from the Middle Ages compared to the Ancient and Early Modern periods, making this a valuable resource in the history of silk fabrics in Japan.
{"title":"14C DATING OF HISTORICAL JAPANESE MUSICAL INSTRUMENT SACKS","authors":"Misao Yokoyama, Minoru Sakamoto, Hikaru Takaya, Kazuyoshi Kanamori","doi":"10.1017/rdc.2023.114","DOIUrl":"https://doi.org/10.1017/rdc.2023.114","url":null,"abstract":"The radiocarbon (<jats:sup>14</jats:sup>C) dating method was applied to a survey of treasured items related to the ruins of the Imperial Residence in Anou, Nara Prefecture, which was one of the capitals of Japan during the 14th century. In this work, we dated two storage bags for Japanese musical instruments that are believed to be from the period of Emperor Go-Daigo who established the Southern Court. The <jats:sup>14</jats:sup>C dating of these treasures proved that the musical instrument sacks are contemporaneous with the dating of the Imperial Residence ruins designated as an Important Cultural Property of Japan. In addition, there are limited surviving examples of silk fabrics from the Middle Ages compared to the Ancient and Early Modern periods, making this a valuable resource in the history of silk fabrics in Japan.","PeriodicalId":21020,"journal":{"name":"Radiocarbon","volume":"9 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139754501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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