Glass Mountain
E99784
Glass Mountain is a prominent obsidian lava dome complex on the eastern flank of Medicine Lake Volcano in northern California, known for its extensive glassy rhyolitic flows.
Statements (34)
| Predicate | Object |
|---|---|
| instanceOf |
obsidian lava dome complex
ⓘ
volcanic landform ⓘ |
| access | reached by forest roads in the Medicine Lake area ⓘ |
| age | Holocene ⓘ |
| color | dark gray to black ⓘ |
| composition |
obsidian
ⓘ
rhyolite ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| dominantMagmaType | high-silica rhyolite ⓘ |
| eruptionProduct |
blocky lava flow
ⓘ
lava dome ⓘ |
| eruptionStyle | effusive ⓘ |
| geologicalSetting | back-arc region east of the main Cascade arc ⓘ |
| hazardType |
lava flows
ⓘ
tephra fall ⓘ |
| isPartOf |
Medicine Lake Volcano
ⓘ
surface form:
Medicine Lake Volcano edifice
|
| lastEruptionPeriod | Holocene ⓘ |
| locatedIn |
Medicine Lake Highlands
ⓘ
Modoc County, California NERFINISHED ⓘ Siskiyou County, California NERFINISHED ⓘ eastern flank of Medicine Lake Volcano ⓘ northern California NERFINISHED ⓘ |
| materialUse | source of obsidian for tool-making by Indigenous peoples ⓘ |
| namedAfter | its glassy obsidian surface ⓘ |
| near | Medicine Lake NERFINISHED ⓘ |
| partOf |
Cascade Volcanic Arc
ⓘ
surface form:
Cascade Range volcanic arc
|
| protectedArea | within national forest lands ⓘ |
| region |
Cascade Range volcanic province
ⓘ
surface form:
Cascade volcanic province
|
| rockType | glassy rhyolite ⓘ |
| surfaceFeature |
extensive glassy rhyolitic flows
ⓘ
obsidian flow fronts ⓘ steep-sided lava domes ⓘ |
| texture | vitreous ⓘ |
| volcanicField | Medicine Lake Volcano ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.