Abstract:
A comprehensive post-28 ka record of the Egmont volcano's eruptive history is presented, and the relationships of andesitic tephra beds to andic soil material, Egmont-sourced volcaniclastic detritus, and two silicic tephra beds from Taupo Volcano are discussed, along with implications for inter-regional correlation. The post-28 ka tephra succession is recorded in 16 andesitic tephra formations. At least 76 tephra events from Egmont Volcano have been recorded since c28 ka with an average eruptive perodicity of one in every c330 yr. This frequency is considered mininal since more tephras of lesser magnitude may have been erupted but are only represented on the ring plain as intermittent accretion of fine-grained ash that has rapidly weathered to andic soil material.
