Browsing Radiocarbon, Volume 52, Number 4 (2010) by Authors
14C Record and Wiggle-Match Placement for the Anatolian (Gordion Area) Juniper Tree-Ring Chronology ~1729 to 751 cal BC, and Typical Aegean/Anatolian (Growing Season Related) Regional 14C Offset AssessmentManning, Sturt W.; Kromer, Bernd; Bronk Ramsey, Christopher; Pearson, Charlotte L.; Talamo, Sahra; Trano, Nicole; Watkins, Jennifer D. (Department of Geosciences, The University of Arizona, 2010-01-01)The East Mediterranean Radiocarbon (inter-)Comparison Project (EMRCP) has measured the 14C ages of a number of sets of tree rings from the Gordion Area dendrochronology from central Anatolia at the Heidelberg Radiocarbon Laboratory. In several cases, multiple measurements were made over a period from the 1980s to 2009. This paper presents the final data set from this work (128 high-precision measurements), and considers (i) the relationship of these data against the standard Northern Hemisphere 14C calibration data set (IntCal09), and (ii) the optimum calendar dating of this floating tree-ring record on the basis of the final set of high-precision 14C data. It finds good agreement between the Anatolian data and IntCal09 in some important intervals (e.g. ~1729 to 1350 cal BC) and observes one period (9th-8th centuries BC) where there appears to be some indication of a regional/growing season signal, and another period (later 14th-13th centuries BC) where IntCal09 may not best reflect the real 14C record. The scale of the typical growing-season-related regional 14C offset (Delta-R) between the Aegean/Anatolian region and IntCal09 is also assessed (for the mid-2nd millennium BC and mid-2nd millennium AD), and found to be usually minor (at times where there are no major additional forcing factors and/or issues with the IntCal09 data set): of the order of 2-4 +/- 2-4 yr.
A Response to Finkelstein and Piasetzky's Criticism and "New Perspective"Mazar, Amihai; Bronk Ramsey, Christopher (Department of Geosciences, The University of Arizona, 2010-01-01)The following short paper is a response to criticism by Finkelstein and Piasetzky (2010b), published in the present issue of Radiocarbon, of our 2008 paper in Radiocarbon concerning the evaluation of 14C dates from Iron Age levels in Israel published by Boaretto et al. (2005). We refer to criticism concerning exclusion and inclusion of data. We also evaluate new models suggested by Finkelstein and Piasetzky and in particular their suggestion of regional stages marking the end of the Iron Age in Israel. We also comment on several methodological issues.