Calibration of radiocarbon dates: tables based on the consensus data of the Workshop on Calibrating the Radiocarbon Time Scale

Abstract

A calibration is presented for conventional radiocarbon ages ranging from 10 to 7240 years IMP and thus covering a calendric range of 8000 years from 6050 BC to AD 1950. Distinctive features of this calibration include 1) an improved data set consisting of 1154 radiocarbon measurements on samples of known age, 2) an extended range over which radiocarbon ages may be calibrated (an additional 530 years), 3) separate 95% confidence intervals (in tabular from) for six different radiocarbon uncertainties (20, 50, 100, 150, 200, 300 years), and 4) an estimate of the non-Poisson errors related to radiocarbon determinations, including an estimate of the systematic errors between laboratories.

Holocene sea levels in northern Viti Levu, Fiji

“…& H. (Scleractinia), were removed from the upper surface of fringing reefs at both their landward and seaward margins. Shelly material was removed physically and the calcareous coral matrix was radiocarbon dated, using a -370 year marine carbonate correction, based on a Fijian Strombus shell and the calibration curve of Klein et al (1982). X-ray diffraction analysis of two specimens (NZ6729 and NZ6746) indicated <0.1 % calcite in the coral matrix, which is an insignificant level of recrystallisation.…”

Geomagnetic Secular Variation Reconstructed from Magnetizations of Wide-Diameter Cores of Holocene Sediments in Japan.

“…The radiocarbon ages were calibrated by dendrochronology (KLEIN, 1982) for ages after 8000 yrBP and by varve chronology (SCHOVE, 1983) (Table 3). Two aberrant ages with a mark "?"…”

Meetings of Interest

“…Such work continued, and radiocarbon dates can now be calibrated for most of the Holocene. [25][26][27] The transfer of collections and expansion of the Laboratory of TreeRing Research in the 1960s resulted in significant advances in dendrochronology and southwestern archeology, as well as other fields. Bannister 28 -29 refined the dating of several of the larger ruins in Chaco Canyon, developed theoretical approaches to dendroarcheology, and became the director of the Laboratory of Tree-Ring Research.…”