Data for: Detailed tephrochronology and composition of major Holocene eruptions from Avachinsky, Kozelsky, and Koryaksky volcanoes in Kamchatka

Database on the Holocene tephra compositions of Avachinsky, Koryaksky and Kozelsky volcanoes (Kamchatka). Bulk tephra major and trace element contents, glass major and trace element compositions and results of the Bayesian framework age calibration procedure. OxCal CQL code of Bayesian age model.