Cascades Volcano Observatory, Vancouver, Washington

Mount Bailey, Oregon

• Mount Bailey Volcano
  -- Geographic Setting, and Geologic and Eruptive History
  Mount Bailey is the southernmost volcano in a north-south-trending volcanic chain 10 kilometers long that rises west of Diamond Lake. Bailey is about the same age as Diamond Peak, 43 kilometers north: less than 100,000 years but greater than 11,000 years old, on the basis of glacial evidence and morphologic comparisons with dated volcanoes. Like Diamond Peak, Bailey consists of a tephra cone surrounded by basaltic andesite lava. Bailey is slightly smaller (8-9 cubic kilometers) than Diamond Peak, and minor andesite erupted from the summit cone in its late stages, whereas Diamond Peak eruptions were never more siliceous than basaltic andesite. -- Sherrod, 1990, IN: Wood and Kienle

[Map,21K,InlineGIF]
Southern Oregon Cascades
-- Modified from: Hoblitt, et.al., 1987, USGS Open-File Report 87-297

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