scholarly journals A Partial Bison (Bison cf. B. latifrons) Skeleton from Chuchi Lake, and its Implications for the Middle Wisconsinan Environment of Central British Columbia

2007 ◽  
Vol 50 (1) ◽  
pp. 73-80 ◽  
Author(s):  
C. Richard Harington ◽  
Alain Plouffe ◽  
Hélène Jetté
Keyword(s):  
Mass Spectrometry ◽  
British Columbia ◽  
Accelerator Mass Spectrometry ◽  
Bison Bison ◽  
Radiocarbon Date ◽  
Open Forest ◽  
Shrub Tundra ◽  
Left And Right

ABSTRACT Fragmentary but massive left and right horncores, found with eight post-cranial bones, from a clay unit underlying a diamicton of the last (Fraser) glaciation at Chuchi Lake, British Columbia probably represents an individual giant bison (Bison cf. B. latifrons). A sample of bone from one of the horncores yielded an accelerator mass spectrometry (AMS) radiocarbon date of 30 740 ± 220 BP, whereas overlapping dates from two other laboratories on an associated humerus are 34 800 ± 420 BP and 35 480 ± 1080 BP. Despite the discrepancy between horncore and humerus dates, they are in accord with the suspected stratigraphie age of the clay unit whence they came. Analysis of pollen from that clay unit indicates that bison with massive horns once occupied an open forest in the vicinity. Probably giant bison and Columbian mammoths (incorporating paleoenvironmental evidence found with the nearby, penecontemporaneous Babine Lake mammoth) shared lake-dotted open forest to shrub tundra range in what is now central British Columbia toward the close of the Middle Wisconsinan (Olympia Nonglacial Interval). The Chuchi Lake specimen is important because it is the first indication of giant bison from British Columbia, and it appears to be one of the latest known survivors of this species.

Accelerator radiocarbon date confirms early deglaciation of the Queen Charlotte Islands

1985 ◽  
Vol 22 (5) ◽  
pp. 790-791 ◽  
Author(s):  
Rolf W. Mathewes ◽  
J. S. Vogel ◽  
J. R. Southon ◽  
D. E. Nelson
Keyword(s):  
Mass Spectrometry ◽  
British Columbia ◽  
Accelerator Mass Spectrometry ◽  
Radiocarbon Date ◽  
Queen Charlotte Islands

Accelerator mass spectrometry was used to test whether part of eastern Graham Island was ice free at the height of late Wisconsin glaciation on mainland British Columbia. An accelerator radiocarbon date of 14 700 ± 700 years on a small twig conforms with two conventional dates that suggested that the Cape Ball region of Graham Island was deglaciated by about 15 000 radiocarbon years ago.

scholarly journals Tree-Ring Dating and AMS Wiggle-Matching of Wooden Statues at Neunggasa Temple in South Korea

Radiocarbon ◽  
2010 ◽  
Vol 52 (3) ◽  
pp. 924-932 ◽  
Author(s):  
Won-Kyu Park ◽  
Yojung Kim ◽  
Ah-Reum Jeong ◽  
Sang-Kyu Kim ◽  
Jung-Ae Oh ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Confidence Interval ◽  
South Korea ◽  
Tree Ring ◽  
Tree Rings ◽  
Accelerator Mass Spectrometry ◽  
Early Spring ◽  
Radiocarbon Date ◽  
Historical Document ◽  
Natural Drying

This paper reports the results of tree-ring dating and accelerator mass spectrometry (AMS) wiggle-matching for wooden Buddhist statues stored at the Eungjindang Hall of Neunggasa Temple, South Korea. Among 23 statues, 10 were successfully dated by tree rings. The cutting date of logs used for the statues was determined as some time between late fall 1684 and early spring 1685 when the bark ring (AD 1684) completed latewood formation. The 95.4% confidence interval of a radiocarbon date (cal AD 1688–1713, 2 σ), which was obtained by wiggle-matching 7 samples of a statue, is similar to the dendro-date (AD 1684). A historical document recorded that the statues in the Eungjindang of Neunggasa were dedicated in July 1685. The dendro-date and written record indicate that Eungjindang statues were made within 3–8 months after log cutting. This seems rather short if we consider the period required for natural drying to avoid defects such as cracking and crooking.

scholarly journals The Antiquity of the Prehistoric Settlement of the Central-South Brazilian Coast

Radiocarbon ◽  
2002 ◽  
Vol 44 (3) ◽  
pp. 733-738 ◽  
Author(s):  
T A Lima ◽  
K D Macario ◽  
R M Anjos ◽  
P R S Gomes ◽  
M M Coimbra ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Rio De Janeiro ◽  
Radiocarbon Date ◽  
Brazilian Coast ◽  
Unexpected Result ◽  
Southern Coast ◽  
Central South

We discus here the prehistoric settlement of the central-south Brazilian coast, and, more specifically, 1 old radiocarbon date obtained for a costal shellmound, as well as its implications concerning the chronology attributed to the settlement process. The accelerator mass spectrometry (AMS) technique was used to determine the 14C age of charcoal from a shellmound on the southern coast of Rio de Janeiro. The resulting age was 7860 ± 80 BP, an unexpected result that reinforces 2 similar previously obtained dates for the same region. Brazilian archaeologists, however, have questioned those 2 dates, because they would predate by some 2000 yr the antiquity consensually accepted for the settlement of the central-south Brazilian littoral.

New accelerator mass spectrometry radiocarbon ages for the Mazama tephra layer from Kootenay National Park, British Columbia, Canada

1997 ◽  
Vol 34 (9) ◽  
pp. 1202-1209 ◽  
Author(s):  
D. J. Hallett ◽  
L. V. Hills ◽  
J. J. Clague
Keyword(s):  
Mass Spectrometry ◽  
British Columbia ◽  
Accelerator Mass Spectrometry ◽  
National Park ◽  
Tephra Layer ◽  
Fall Deposits

Charcoal fragments recovered from the Mazama air-fall tephra layer in cores from Dog and Cobb lakes, Kootenay National Park, British Columbia, yielded accelerator mass spectrometry ages of 6720 ± 70 and 6760 ± 70 14C years BP, respectively. These two new ages, together with other previously published radiocarbon ages on charcoal and twig fragments from Mazama air-fall deposits, indicate that the climactic eruption of Mount Mazama occurred 6730 ± 40 14C years BP.

INTER-UNIVERSITY ACCELERATOR CENTRE, NEW DELHI (IUACD) RADIOCARBON DATE LIST II

Radiocarbon ◽  
2021 ◽  
pp. 1-31
Author(s):  
Rajveer Sharma ◽  
Pankaj Kumar ◽  
Sunil Ojha ◽  
Satinath Gargari ◽  
Sundeep Chopra
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Radiocarbon Date ◽  
New Delhi ◽  
Cosmogenic Radionuclide ◽  
Pelletron Accelerator

ABSTRACT Accelerator mass spectrometry (AMS) activities at the Inter-University Accelerator Centre (IUAC) in New Delhi, India, started with its 15UD Pelletron accelerator and cosmogenic radionuclide (CRN) measurements of 10Be and 26Al. Realizing the demand of a radiocarbon (14C) AMS facility in India, a 500kV Pelletron accelerator based AMS system was installed in 2015. This facility was designated with the lab code IUACD for 14C measurements. 14C dates measured in 2015 and 2016 were published in the first radiocarbon date list (see text for details). The present list is the second 14C date list and consists of dates measured from January to December 2017.

scholarly journals 14C Dating of the Upper Paleolithic Site at Krems-Hundssteig in Lower Austria

Radiocarbon ◽  
2008 ◽  
Vol 50 (1) ◽  
pp. 1-10 ◽  
Author(s):  
E M Wild ◽  
C Neugebauer-Maresch ◽  
T Einwögerer ◽  
P Stadler ◽  
P Steier ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Archaeological Site ◽  
Upper Paleolithic ◽  
Radiocarbon Date ◽  
Cultural Layer ◽  
Archaeological Remains ◽  
14C Dating ◽  
Paleolithic Site

The open-air archaeological site at Krems-Hundssteig is a well-known Upper Paleolithic site located in Lower Austria. The site was discovered in the late 19th/early 20th centuries when a large number of archaeological remains were collected during the course of loess quarrying. Although no systematic excavation has ever been performed, Krems-Hundssteig has been described since its discovery as typical of the Aurignacian period in this region based on the numerous archaeological finds; accordingly, the culture has been named Kremsien by some authors. Surprisingly, the artifacts found in a recent excavation adjacent to this location showed solely Gravettian features, calling into question the original assignment to the Aurignacian. Although the earlier assignment was supported by a radiocarbon date of ∼35 kyr BP (Hahn 1977), new accelerator mass spectrometry (AMS) 14C dates proved that the recently excavated cultural layer originates from the Gravettian period. Older paleosols were also detected by sondage drillings at some depth below it.The new results indicate that a large Aurignacian level and a substantial complex of Gravettian layers are present in this area. Therefore, it must be assumed that more than 1 cultural level was affected and destroyed by the historic loess quarrying, and that the assemblage of Krems-Hundssteig artifacts, traditionally ascribed to the Aurignacian, might be interspersed with Gravettian pieces.

scholarly journals Pleistocene Bison Skeleton (Bison bison cf. occidentalis) from Clayhurst Crossing, British Colombia

2007 ◽  
Vol 48 (2) ◽  
pp. 213-233 ◽  
Author(s):  
Brian Apland ◽  
Charles R. Harington
Keyword(s):  
Mass Spectrometry ◽  
North America ◽  
Accelerator Mass Spectrometry ◽  
Weighted Average ◽  
Bison Bison ◽  
Radiocarbon Dates ◽  
Peace River ◽  
River Terraces ◽  
Southern Alberta ◽  
British Colombia

ABSTRACT Remains of a large old male bison skeleton from a gravel pit near Clayhurst Crossing are tentatively referred to the extinct western bison (Bison bison cf. occidentalis). It is the most complete late Pleistocene "medium-horned" bison so far reported from Canada, and is therefore described in detail. Four accelerator mass spectrometry (AMS) radiocarbon dates on bone from the specimen provide a weighted average age of 10,500±90 yr BP, supporting an earlier suggestion that river terraces in the mid-Peace area began developing before 10,000 years ago. Evidently Bison bison antiquus occurred in southern Alberta about 11,000 years ago, and both it and Bison bison occidentalis occupied the Peace River area shortly before 10,000 years ago. It is hypothesised that by at least 9700 BP, B. b. occidentalis had spread southern Alberta. These data suggest that biotic interchange between the former Beringian refugium and the southern interior Plains of North America occurred prior to 10,500 years ago.

scholarly journals A Black Deer at Black Cave: New Pictograph Radiocarbon Date for the Lower Pecos, Texas

2015 ◽  
Author(s):  
Lennon Bates ◽  
Amanda Castañeda ◽  
Carolyn Boyd ◽  
Karen Steelman
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Rock Art ◽  
Radiocarbon Date ◽  
Plasma Oxidation ◽  
Time Period ◽  
Pecos River ◽  
Age Range ◽  
Lower Pecos

A Pecos River style painting of a black deer from Black Cave Annex (41VV76a) in southwest Texas was radiocarbon dated. Using plasma oxidation and accelerator mass spectrometry, we obtained an age of 1465 ± 40 RCYBP (2 sigma calibrated age range of A.D. 470-660). This age is younger than the accepted age range for Pecos River style paintings, which is approximately 4000-3000 years B.P. This new measurement in association with other younger dates prompts us to question whether the Pecos River style endured for a longer time period than previously thought. More radiocarbon research is needed in order to understand how this anomalous result might fit within the Lower Pecos Canyonlands rock art chronology.

scholarly journals Hiatus in Prehistoric Chronology of the Cis-Baikal Region, Siberia: Pattern or Artifact?

Radiocarbon ◽  
2007 ◽  
Vol 49 (1) ◽  
pp. 123-129 ◽  
Author(s):  
Yaroslav V Kuzmin
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Baikal Region ◽  
Critical Evaluation ◽  
Burial Grounds

The problem of a hiatus at about 6100–5300 BP (about 4900–4200 cal BC) in the prehistoric chronology of the Cis-Baikal region in Siberia is discussed. Based on a critical evaluation of existing evidence, there was no discontinuity found in the cultural sequence between the Kitoi and Serovo/Glazkovo complexes of the Neolithic, and the proposed “hiatus” may be an artifact based on underestimation of solid data. Conventional 14C dates are presented that were generated in the 1980s to early 2000s for Cis-Baikal prehistoric burial grounds, and were later dated by the accelerator mass spectrometry (AMS).

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