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Filtering by: Creator Larson, Cameron Advisor Kent, Adam J. R.

Magma chamber processes over the past 475,000 years at Mount Hood, Oregon : insights from crystal zoning and crystal size distribution studies

Creator:

Darr, Cristina M.

Abstract:

Several different petrological techniques have been applied to lava flows between 200 to 475,000 years old from Mount Hood, Oregon. Mount Hood is unusual, in comparison to nearby Mount St. Helens and Mount Jefferson, in that it has produced relatively homogeneous lava compositions over 475,000 years. Erupted lavas are mostly...

Resource Type:

Masters Thesis

Full Text:

; Cameron and Pringle, 1986, 1987; Crandell, 1980; Hoblitt, et al., 1987; Priest, 1982; Scott, et al
Controls on eruption style and magma compositions at Mount Hood, Oregon

Creator:

Koleszar, Alison M.

Abstract:

This study is an effort to characterize the magma sources, plumbing system, and eruptive behavior of Mount Hood, a low-explosivity recharge-dominated volcano in the Oregon Cascades. The three manuscripts in this dissertation make use of melt inclusion data, phenocryst compositions, and whole rock petrology and geochemistry to build a schematic...

Resource Type:

Dissertation

Full Text:

Professional Paper 1750: Reston, U.S. Geological Survey. Conrey, R.M., Hooper, P.R., Larson, P.B., Chesley
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