Deschutes & Ochoco National Forests
Crooked River National Grassland

Oregon Volcanoes

Brown Mountain Volcano

SUMMARY

Type: shield volcano
Activity: extinct?
Last Eruption: more than 12,000 years ago
Rock Type: basaltic andesite to andesite
Eruptive Volume: 5 cu km
Latitude: 43.36 N
Longitude: 122.27 W
Location Maps: from TIGER Mapping Service

• State Level - shows state and communities
• County Level - shows county lines, highways, and communities
• Local Level - shows above plus lakes and local roads

Topo Map from TopoZone

GEOLOGIC BACKGROUND:

Brown Mountain is a small shield volcano capped by a summit cinder cone as is common of many of the smaller Cascade peaks.

HISTORIC ACTIVITY:

• None

DATA SOURCE:

• USGS

ADDITIONAL INFORMATION