Description
This image is a digital copy of an image from
the U.S. Geological Service web site: USGS Cascades
Volcano Observatory; Report: Volcano and Earthquake Hazards
in Crater Lake Region, Oregon.
Caption (page bottom): Geologic Map -
Crater Lake Caldera Floor, United States Geological Survey
Lower right-hand margin label: Topinka,
USGS/CVO, 1999, Bacon, et. al. 1997, USGS Open-File Report
97-487.
