RSS 1.0Radiocarbon, Volume 36, Number 3 (1994)
ABOUT THIS COLLECTION
Radiocarbon is the main international journal of record for research articles and date lists relevant to 14C and other radioisotopes and techniques used in archaeological, geophysical, oceanographic, and related dating.
This archive provides access to Radiocarbon Volumes 1-54 (1959-2012).
As of 2016, Radiocarbon is published by Cambridge University Press. The journal is published quarterly. Radiocarbon also publishes conference proceedings and monographs on topics related to fields of interest. Visit Cambridge Online for new Radiocarbon content and to submit manuscripts.
ISSN: 0033-8222
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Recent Submissions
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Radiocarbon, Volume 36, Number 3 (1994)Department of Geosciences, The University of Arizona, 1994-01-01
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From Radiocarbon: Calibration 1993Department of Geosciences, The University of Arizona, 1994-01-01
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From Radiocarbon: Late Quaternary Chronology and Paleoclimates of the Eastern MediterraneanDepartment of Geosciences, The University of Arizona, 1994-01-01
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From Radiocarbon: LSC 92Department of Geosciences, The University of Arizona, 1994-01-01
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From Springer-Verlag and Radiocarbon: Radiocarbon After Four Decades: An Interdisciplinary PerspectiveDepartment of Geosciences, The University of Arizona, 1994-01-01
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Friends of RadiocarbonDepartment of Geosciences, The University of Arizona, 1994-01-01
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Associate EditorsDepartment of Geosciences, The University of Arizona, 1994-01-01
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7th International Conference on Accelerator Mass SpectrometryDepartment of Geosciences, The University of Arizona, 1994-01-01
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1995 Price ListDepartment of Geosciences, The University of Arizona, 1994-01-01
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Subject Index – Volume 36, 1994Department of Geosciences, The University of Arizona, 1994-01-01
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Radiocarbon UpdatesDepartment of Geosciences, The University of Arizona, 1994-01-01
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Radiocarbon Dating Sites of Northwest Russia and LatviaWe describe applications of radiocarbon dating used for establishing a chronology of archaeological sites of the Novgorod region at the end of the first millennium AD. We have 14C-dated known-age tree rings from sites in Latvia and ancient Novgorod, northwest Russia, as well as charcoal and wood from Novgorod. Calendar ages of 14C-dated tree rings span the interval, AD 765-999. We used the Groningen calibration program, CAL15 (van der Plicht 1993) to calibrate 14C ages to calendar years. Comparisons between 14C results and archaeological data show good agreement, and enable us to narrow the calendar interval of calibrated 14C determinations.
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Prehistoric Colonization of Northeastern Siberia and Migration to America: Radiocarbon EvidenceThis review of radiocarbon dates from northeastern Siberian Paleolithic sites provides data that can be applied to establishing a chronology of human settlement, and that can provide a rough estimate of the timing of the initial peopling of the New World.
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Pollen Concentrate Preparation from Highly Organic Holocene Peat and Lake Deposits for AMS DatingMany of the problems inherent with conventional 14C dating of lake and peat deposits are eliminated by AMS dating of pollen concentrates. Published work describes production of pollen concentrates through expulsion of most of the deposit matrix by repeated deflocculation, selective sieving and final retention of the largest subfossil pollen taxa. Less suited to pollen concentrate production are the highly organic peats and lake muds from the British Isles and Europe. In this study we tested the combined effectiveness of physical, chemical and microbiological degradation and elimination techniques for pollen concentrate production on highly organic peats and a lake mud. We also reviewed methods of enhancing concentrations of smaller sub-fossil pollen grains. Here we present a novel method of assessing AMS dating precision of pollen concentrates by comparing their calibrated dates with a volcanic event of known historical age.
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On the 14C and 39Ar Distribution in the Central Arctic Ocean: Implications for Deep Water FormationWe present Delta-14C and 39Ar data collected in the Nansen, Amundsen and Makarov basins during two expeditions to the central Arctic Ocean (RV Polarstern cruises ARK IV/3, 1987 and ARK VIII/3,1991). The data are used, together with published Delta-14C values, to describe the distribution of Delta-14C in all major basins of the Arctic Ocean (Nansen, Amundsen, Makarov and Canada Basins), as well as the 39Ar distribution in the Nansen Basin and the deep waters of the Amundsen and Makarov Basins. From the combined Delta-14C and 39Ar distributions, we derive information on the mean "isolation ages" of the deep and bottom waters of the Arctic Ocean. The data point toward mean ages of the bottom waters in the Eurasian Basin (Nansen and Amundsen Basins) of ca. 250-300 yr. The deep waters of the Amundsen Basin show slightly higher 3H concentrations than those in the Nansen Basin, indicating the addition of a higher fraction of water that has been at the sea surface during the past few decades. Correction for the bomb 14C added to the deep waters along with bomb 3H yields isolation ages for the bulk of the deep and bottom waters of the Amundsen Basin similar to those estimated for the Nansen Basin. This finding agrees well with the 39Ar data. Deep and bottom waters in the Canadian Basin (Makarov and Canada Basins) are very homogeneous, with an isolation age of ca. 450 yr. Delta-14C and 39Ar data and a simple inverse model treating the Canadian Basin Deep Water (CBDW) as one well-mixed reservoir renewed by a mixture of Atlantic Water (29%), Eurasian Basin Deep Water (69%) and brine-enriched shelf water (2%) yield a mean residence time of CBDW of ca. 300 yr.
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LaboratoriesDepartment of Geosciences, The University of Arizona, 1994-01-01
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Human Settlements and the Last Deglaciation in the French AlpsAccording to most geological and geomorphological studies, the maximal advance of the Wurmian glaciers in the French Alps occurred at least before 40 ka BP and cannot be dated by 14C. Scientists believed that this dating method could be used for dating the last glacial advance and late deglaciation in the region. The scarce and scattered 14C dating results available from geological samples do not confirm an early (ca. 18 or 20 ka BP) age for the total cooling of the ice nor do they prove that residual ice sheets remained at low elevations. Attempting to solve this chronological problem, we compiled current archaeological knowledge of the oldest Late Paleolithic sites. A review of their 14C results shows that no site older than 15 ka BP (with Gravettian, Solutrean or early Magdalenian industries) can be found east of the Saone-Rhone Valley, even at low elevations. Only rare sites, dated to ca. 14.5 ka BP, may be found close to the mountain regions that were suddenly occupied around the beginning of the Bulling period (ca. 13.5 ka BP). Thus, it seems that the eastern Alps offer no evidence for direct association between glacial retreat and human settlement or simultaneous occurrence in early or late deglaciated areas.
