| Major-element geochemistry, stratigraphy and Bayesian statistical age modeling are combined with the aim of integrating paleoclimate records. The goal is to create a tephrochronological framework for northwestern North America. The coastal region of southeastern Alaska is explored through a terrestrial peat core and a marine core. The widespread Mount Edgecumbe dacite (MEd) is identified in both cores. The age of the MEd is modeled between 13,270 - 13,050 cal yrs BP. This date is used to estimate the marine reservoir for this area; approximately 320 -- 810 years. Four sulphate peaks from the PR Col ice core from Mt Logan are investigated for associated cryptotephras. The expected tephras are found for White River East and Aniakchak events, and possible correlations are found for White River North and Hayes Tephra Set H events. The PR Col age model for these tephras is tested against terrestrial age estimations, and shows good agreement. |
