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Filtering by: Creator Qamar, Anthony Committee Member Duncan, Robert A.

The Deschutes Formation: evidence of extension-enhanced explosivity in the early High Cascades

Creator:

Pitcher, Bradley W.

Abstract:

The eruptive history of the Quaternary Cascades arc has been relatively well characterized. However, much less is known about the frequency and sizes of explosive eruptions produced by earlier stages of the arc. The Late Neogene Deschutes Formation of Central Oregon preserves a remarkable record of heightened pyroclastic activity during...

Resource Type:

Dissertation

Full Text:

Electron Microprobe. Constant help from Dan Miggins and Anthony Koppers with the 40Ar/39Ar sample