Mass Spectrometric Radiocarbon Dates from Three Rock Paintings of Known Age

2001 ◽  
Vol 66 (3) ◽  
pp. 471-480 ◽  
Author(s):  
Ruth A. Armitage ◽  
James E. Brady ◽  
Allan Cobb ◽  
John R. Southon ◽  
Marvin W. Rowe
Keyword(s):  
Mass Spectrometric ◽  
Radiocarbon Dates ◽  
Radiocarbon Age ◽  
Potential Problems ◽  
Rock Paintings ◽  
The Tropics ◽  
Calendar Dates ◽  
Age Determinations

Radiocarbon age determinations are presented on three hieroglyphic texts from Naj Tunich cave in Guatemala containing Maya calendar dates. The ages obtained are on average 110–140 years older than the calendar dates. Several possible reasons are discussed for this discrepancy: one that is applicable to all radiocarbon dates on charcoal, one that applies to rock paintings, and one that is specific for the tropics. Possible problems with the ages ascribed to the Maya calendar dates are also discussed. Even with the potential problems that may exist, these dates still fall within 110–140 years of the ascribed calendar dates. Caution is urged in the interpretation of dates on charcoal pigments from rock paintings; consideration of the “old wood” and “old charcoal” factors is important.

scholarly journals Moscow MV Lomonosov State University Radiocarbon Dates I

Radiocarbon ◽  
1980 ◽  
Vol 22 (1) ◽  
pp. 82-90 ◽  
Author(s):  
N I Glushankova ◽  
O B Parunin ◽  
T A Timashkova ◽  
V Z Khait ◽  
A I Shlukov
Keyword(s):  
Measurement Procedure ◽  
State University ◽  
Radiocarbon Dates ◽  
Radiocarbon Age ◽  
Methodological Aspects ◽  
Age Determinations

The following list sums up the results of radiocarbon age determinations obtained at the Laboratory in 1974-1975. The list is prefaced with a brief description of the measurement procedure and discussion of some methodological aspects of the investigation that result in a higher accuracy of dating.

Marine reservoir corrections for bowhead whale radiocarbon age determinations

1996 ◽  
Vol 33 (12) ◽  
pp. 1628-1637 ◽  
Author(s):  
Arthur S. Dyke ◽  
Roger N. McNeely ◽  
James Hooper
Keyword(s):  
Canadian Arctic ◽  
Bowhead Whale ◽  
Bone Collagen ◽  
Radiocarbon Dates ◽  
Marine Molluscs ◽  
Terrestrial Plant ◽  
Radiocarbon Age ◽  
Raised Beaches ◽  
Eastern Canadian Arctic ◽  
Age Determinations

Twenty-two pairs of radiocarbon dates on driftwood and bowhead whale (Balaena mysticetus) bones from raised beaches, dates on whale bone and terrestrial plant detritus from a stratigraphie section, and 25 additional dates on whale bones from the lowest (≤1 ka BP) raised beaches in the eastern Canadian Arctic suggest that a marine reservoir correction of about −200 years is appropriate for normalized age determinations on bone collagen from the bowhead whale in this region. This is less than the correction (−400 years) normally applied to carbonate shells of marine molluscs from this region. The carbon in bowhead collagen appears to be derived from the whales' zooplankton food rather than from marine bicarbonate.

scholarly journals Chronometric Dating and Late Holocene Prehistory in the Hawaiian Islands: A Critical Review of Radiocarbon Dates from Moloka'I Island

Radiocarbon ◽  
1989 ◽  
Vol 31 (2) ◽  
pp. 121-144 ◽  
Author(s):  
Marshall Weisler
Keyword(s):  
Late Holocene ◽  
The United States ◽  
Archaeological Sites ◽  
Radiocarbon Dates ◽  
Radiocarbon Age ◽  
The Past ◽  
The World ◽  
Growing Body ◽  
Over Time ◽  
Age Determinations

The importance of chronometric dating in archaeology cannot be overemphasized. Indeed, most chronologies developed throughout the world during the past three decades have depended on radiocarbon age determinations to provide a temporal framework for examining change over time in cultural sequences during the late Pleistocene and Holocene. With the advent of legislation in the mid-1960s designed to protect archaeological sites in the United States threatened by increased urban development or government sponsored projects, archaeological surveys and excavations were mandated as a means for preserving information otherwise destroyed. As a result, thousands of projects have contributed to a growing body of “gray literature,” ie, unpublished proprietary or manuscript reports with very limited circulation. Within these reports are hundreds, if not thousands, of 14C age determinations, most of which are not accessible in published form. One objective of this paper is to present all the 14C age determinations for the island of Moloka'i, Hawai'i as of December 1988, including 41 dates never before published with stratigraphic details.

scholarly journals Society Islands (Central Eastern Polynesia) Chronology: 11 Radiocarbon Dates for the Late Prehistoric Expansion and Proto-Historic Periods in the ‘Opunohu Valley, Mo'Orea

Radiocarbon ◽  
2006 ◽  
Vol 48 (3) ◽  
pp. 409-419 ◽  
Author(s):  
Jennifer G Kahn
Keyword(s):  
Mass Spectrometry ◽  
Late Prehistoric ◽  
Radiocarbon Dates ◽  
Radiocarbon Age ◽  
Society Islands ◽  
European Contact ◽  
Multiple Structures ◽  
Ams Dating ◽  
Central Eastern ◽  
Age Determinations

The chronology of residential site construction and occupation in the upper reaches of the ‘Opunohu Valley, Mo'orea, Central Eastern Polynesia, has been debated over the last 15 yr. This paper reports a suite of 11 radiocarbon age determinations from excavations at 5 house sites and a simple temple structure (marae). Direct accelerator mass spectrometry (AMS) dating of wood charcoal identified to short-lived taxa confirms site construction and occupation during the mid-15th to 17th centuries, supporting that maximal population density was in the centuries immediately prior to European contact. The study demonstrates that targeted dating of multiple structures within residential complexes allows for multiple phases of site construction and use to be discriminated. These data are critical for adequately assessing site contemporaneity and the development, maintenance, and expansion of residential groups and their house clusters through time.

scholarly journals An Assessment of Radiocarbon Dates from Palau, Western Micronesia

Radiocarbon ◽  
2005 ◽  
Vol 47 (2) ◽  
pp. 295-354 ◽  
Author(s):  
Jolie Liston
Keyword(s):  
Cultural Context ◽  
Site Formation ◽  
Site Formation Processes ◽  
Radiocarbon Dates ◽  
Radiocarbon Age ◽  
The Republic ◽  
Republic Of Palau ◽  
Modern Era ◽  
Systematic Database ◽  
Age Determinations

Archaeological investigations in the Republic of Palau, Micronesia, have produced 409 radiocarbon age determinations from cultural contexts, indicating a range of Palauan occupation from about 3000 yr ago into the modern era. However, these dates are scattered among numerous sources (many difficult to obtain) and are presented in a number of different formats and calibrations. The goal of this paper is to compile a usable, systematic database of all of these Palauan cultural 14C assays. This database will be suitable for developing and evaluating chronological models, an effort being undertaken as a separate paper. Prior to constructing prehistoric colonization and cultural chronologies for Palau, the validity of each assay and the relative adequacy in sample size per cultural and environmental zones must be examined. After systematic recalibration, the reliability of the dates is evaluated in light of sample material, cultural context, and site formation processes. A method for dating monumental earthwork complexes through site formation analysis is presented. Sets of 237 valid and 58 potentially valid 14C dates remain to develop chronological models. The representation of Palau's environmental zones, site types, and regions within the dating pool is examined and compared to ensure meaningfulness in these chronological models. Newly obtained 14C age determinations are also provided.

scholarly journals Radiocarbon Age Constraints on Rates of Advance and Retreat of the Puget Lobe of the Cordilleran Ice Sheet during the Last Glaciation

1998 ◽  
Vol 50 (3) ◽  
pp. 205-213 ◽  
Author(s):  
Stephen C. Porter ◽  
Terry W. Swanson
Keyword(s):  
Average Rate ◽  
Distance Curve ◽  
Radiocarbon Dates ◽  
Radiocarbon Age ◽  
Glacier Terminus ◽  
Ice Retreat ◽  
Time Distance ◽  
Cordilleran Ice Sheet ◽  
Glacier Advance ◽  
Age Constraints

Calibrated radiocarbon dates of organic matter below and above till of the last (Fraser) glaciation provide limiting ages that constrain the chronology and duration of the last advance–retreat cycle of the Puget Lobe in the central and southeastern Puget Lowland. Seven dates for wood near the top of a thick proglacial delta have a weighted mean age of 17,420 ± 90 cal yr B.P., which is the closest limiting age for arrival of the glacier near the latitude of Seattle. A time–distance curve constructed along a flowline extending south from southwestern British Columbia to the central Puget Lowland implies an average glacier advance rate of ca. 135 m/yr. The glacier terminus reached its southernmost limit ca. 16,950 yr ago and likely remained there for ca. 100 yr. In the vicinity of Seattle, where the glacier reached a maximum thickness of 1000 m, ice covered the landscape for ca. 1020 yr. Postglacial dates constraining the timing of ice retreat in the central lowland are as old as 16,420 cal yr B.P. and show that the terminus had retreated to the northern limit of the lowland within three to four centuries after the glacial maximum. The average rate of retreat was about twice the rate of advance and was enhanced by rapid calving recession along flowline sectors where the glacier front crossed deep proglacial lakes.

scholarly journals C14 dating of Survey material performed in 1974

1975 ◽  
Vol 75 ◽  
pp. 19-20
Author(s):  
A Weidick
Keyword(s):  
New Jersey ◽  
Wood Sample ◽  
Field Work ◽  
Plant Anatomy ◽  
Radiocarbon Age ◽  
Apparent Age ◽  
Age Determinations

Thirteen radiocarbon age determinations of shell samples (12) and wood (1) are assembled in tbis account. The material dated was collected in connection with GGU field work. The samples have been dated at Isotopes Inc., Westwood, New Jersey, U.S.A. Determination of the wood sample was kindly made by Jette Dahl Møller, Institute of Plant Anatomy and Cytology, University of Copenhagen. Dating has also been carried out on a number of shelIs, dredged alive prior to 1950, in order to control the apparent age in shell dating determinations (Tauber & Funder, tbis report).

scholarly journals Institut Royal du Patrimoine Artistique Radiocarbon Dates IX

Radiocarbon ◽  
1983 ◽  
Vol 25 (3) ◽  
pp. 867-874 ◽  
Author(s):  
Michèle Dauchot-Dehon ◽  
Mark Van Strydonck ◽  
Jos Heylen
Keyword(s):  
Radiocarbon Dates ◽  
Proportional Counters ◽  
Age Determinations

This list contains the results of 14C age determinations obtained at the laboratory in 1981–1982. Samples are analyzed in three new proportional counters which are described in R, 1980, v 22, p 442. Our installation differs from that of Heidelberg in that our filling gas is methane.

scholarly journals A Protocol for Radiocarbon Dating Tropical Subfossil Cave Guano

Radiocarbon ◽  
2009 ◽  
Vol 51 (3) ◽  
pp. 977-986 ◽  
Author(s):  
Christopher M Wurster ◽  
Michael I Bird ◽  
Ian Bull ◽  
Charlotte Bryant ◽  
Philippa Ascough
Keyword(s):  
Mass Spectrometry ◽  
Southeast Asia ◽  
Accelerator Mass Spectrometry ◽  
Radiocarbon Dating ◽  
Saturated Hydrocarbon ◽  
Lipid Fraction ◽  
Bulk Sample ◽  
Radiocarbon Dates ◽  
Organic Fractions ◽  
Age Determinations

We present accelerator mass spectrometry (AMS) radiocarbon dates on several organic fractions isolated from tropical guano deposits recovered from insular Southeast Asia. Differences were observed between 14C measurements made on bulk guano as well as bulk lipids, the saturated hydrocarbon fraction, solvent-extracted guano, and insect cuticles extracted from the same bulk sample. We infer that 14C dates from the bulk lipid fraction and saturated hydrocarbon fractions can be variably contaminated by exogenous carbon. In contrast, 14C measurements on solvent-extracted guano and isolated insect cuticles appear to yield the most robust age determinations.

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