Δ14c peaks appearing in earlywood and latewood tree rings (ad 770-780) in northeastern arizona

J. H. Park, J. Southon, J. W. Seo, P. P. Creasman, W. Hong, G. Park, K. H. Sung

Research output: Contribution to journalArticlepeer-review

Abstract

The AD 775 peak in Δ14C (henceforth, M12) was first measured by Miyake et al. and has since been confirmed globally. Here we present earlywood and latewood Δ14C values from tree rings of pinyon pine (Pinus edulis) from Mummy Cave, Canyon de Chelly National Monument, Chinle, Arizona, USA, for the period AD 770-780. These data reconfirm the timing of M12 and show a small rise in Δ14C in AD 774 latewood. Allowing for the delay in lateral transfer of radiocarbon produced at high latitude, this suggests that 14C peak production occurred in late winter or spring of AD 774. Additionally, Δ14C decreased slightly in the earlywood of AD 775 and increased in the latewood of AD 775 to a higher level than that observed in AD 774.

Original languageEnglish (US)
Pages (from-to)223-228
Number of pages6
JournalRadiocarbon
Volume63
Issue number1
DOIs
StatePublished - Feb 2021

Keywords

  • M12
  • earlywood and latewood
  • subannual tree ring
  • ΔC in AD 775

ASJC Scopus subject areas

  • Archaeology
  • Earth and Planetary Sciences(all)

Fingerprint

Dive into the research topics of 'Δ<sup>14</sup>c peaks appearing in earlywood and latewood tree rings (ad 770-780) in northeastern arizona'. Together they form a unique fingerprint.

Cite this