An improved age framework for late Quaternary silicic eruptions in northern Central America

  title={An improved age framework for late Quaternary silicic eruptions in northern Central America},
  author={William I. Rose and F. Michael Conway and Carlos R. Pullinger and Alan L. Deino and William C. McIntosh},
  journal={Bulletin of Volcanology},
Abstract Five new stepwise-heating 40Ar/39Ar ages and one new high-sensitivity 14C date of ash-fall and ash-flow deposits from late Quaternary silicic volcanoes in northern Central America document the eruption rates and frequencies of five major rhyodacite and rhyolite calderas (Atitlán, Amatitlán, Ayarza, Coatepeque, and Ilopango) located north of the basalt, andesite, and dacite stratovolcanoes of the Central American volcanic front. These deposits form extensive time-stratigraphic horizons… 

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