Medicine Lake Volcano |
Summary Holocene Eruptive Activity |
Summary of Holocene eruptive activity and probable greatest hazards from future eruptions at volcanic centers in California |
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Volcanic center
(Time interval evaluated) (Reference) |
of major volcanic centers (Time interval evaluated shown in parentheses for each volcano, and much of these data resulted from this study; other references are cited) |
Most recent eruption | Most probable future potential hazard
(Based on consideration of size, frequency, and severity of event.) |
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Lava Flows and cinder cones | Domes | Tephra | Pyroclastic flows | Blasts and pyroclastic surges | Debris avalanches and debris flows | ||||
Medicine Lake Highland Region |
Rhyolite center
(1,500 years) (Chesterman, 1955; Fink and Pollard, 1983; Heiken, 1978; Ives and others, 1964, 1967; Mertzman, 1977) |
At least four lava flows during the last 1,500 years. | Many small silicic domes formed within the last 1,500 years. | Two tephra eruptions of small volume during the last 1,500 years; one slightly older; probable volume 0.05-0.1 cubic kilometers. | None recognized. | None recognized. | None recognized. | Lava flows erupted within the last 1,500 years
(Heiken, 1978). |
Formation of relatively small pyroclastic flows; eruption of tephra. |
Basalt field
(10,000 years) (Finch, 1933) |
At least 15 lava flows and (or) cinder cones within about the last 10,000 years. | None recognized. | Small volumes of mafic tephra erupted with cinder cones and flows. | None recognized. | None recognized. | None recognized. | Several lava flows probably erupted during the
last few hundred years
(Finch, 1933). |
Formation of cinder cones, small volumes of tephra, and lava flows. |
Glass Mountain Obsidian Flow |
Lava Beds National Monument |
Lava Beds National Monument - Volcanics |
Lava Beds National Monmument Points of Interest |
Callahan Lava Flow |
Cinder Butte |
Fleener Chimneys, Black Crater, Ross Chimneys, The Devil's Homestead |
Mammoth Crater, Modoc Crater, and Bearpaw Butte |
Petroglyph Point |
Schonchin Butte |
The Castles |
Valentine Cave, Tickner and Bertha's Cupboard Caves |
Lava Tubes |
Lava Tube Caves |
Medicine Lake Caldera |
Medicine Lake - "The Lake" |
About Medicine Lake in September 1999: |
Thermal and Hydrothermal Areas |
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