Medicine Lake Volcano is a large shield volcano in northeastern California about 30 miles (50 km) NE of Mount Shasta. The volcano is located in a zone of east-west crustal extension east of the main axis of the Cascade Volcanic Arc and the Cascade Range. The 0.6-mile (1 km) thick shield is 22 miles (35 km) from east to west and 28 to 31 miles (45 to 50 km) from north to south and covers more than 770 square miles (2,000 km2). The underlying rock has downwarped by 0.3 miles (0.5 km) under the center of the volcano. The volcano is primarily composed of basalt and basaltic andesite lava flows and has a 4.3-by-7.5-mile (7 by 12 km) caldera at the center.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

ⓘ Basalt

ⓘ Basaltic-andesite

ⓘ Obsidian

List of minerals for each chemical element

Other Databases

Wikipedia:	https://en.wikipedia.org/wiki/Medicine_Lake_Volcano
Wikidata ID:	Q8553599

Other Regions, Features and Areas containing this locality

North AmericaContinent

Cascade RangeMountain Range

North America PlateTectonic Plate

Cascade ArcVolcanic Arc
Hornbrook-Ochoco BasinBasin
Shoofly-Olds Ferry DomainDomain
Southeast Oregon–Northern California BasinsBasin

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References

[1]Wikipedia (see link below)

Rogers, B. W., & Rice, P. H. (1991). Geology and Mineralogy of Lava Tube Caves in Medicine Lake Volcano, California. Cave Research Foundation Annual Report, 25-31.

www.usgs.gov (n.d.) https://www.usgs.gov/volcanoes/medicine-lake/glass-mountain-obsidian-flow-medicine-lake-volcano

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