Aniakchak reported activity

Event Name : Aniakchak Pre-Black Nose Pumice

Stop: 7000

Years BP Tephrochronology

Tephrafall:

Description: From Bacon and others (2014); "A comparatively thin tephra bed (VanderHoek and Myron, 2004, sample ANI 99-L) beneath the principal fall deposit at Cabin Bluff (ANI 99-K) contains glass and Fe-Ti oxides compositionally similar to those of the principal deposit as well as another population of glass that is more evolved and oxides that have somewhat different compositions (appendix A, tables A1 and A2 [in original text]). We tentatively interpret the lower bed as representing one or more eruptions of Aniakchak volcano precursory to the Black Nose Pumice eruptions."