USGS/Cascades Volcano Observatory, Vancouver, Washington
REPORT:
Volcanoes of the Portland Area, Oregon
--
John Elliot Allen, 1975,
Volcanoes of the Portland Area, Oregon:
State of Oregon, Department of Geology and Mineral Industries, The ORE-BIN,
v.37, no.9, September 1975
Table of Contents
-
Introduction
- Types of Volcanoes
- Identification Procedures
- Lavas and Pyroclastics
- Location of Vents
- Density of Vents and Possible Structural Patterns
- Problems
- Conclusions
- References
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05/01/07, Lyn Topinka