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• 2006-02-07 20:04 Hydrargyrum 544×353×8 (83020 bytes) Glass Mountain from [[Medicine Lake Volcano|Medicine Lake]] caldera rim, northern [[California]]. [[United States Geological Survey|USGS]] Photo by Julie Donnelly-Nolan.[http://vulcan.wr.usgs.gov/Volcanoes/MedicineLake/description_medicine_lake.html]