Deschutes & Ochoco National Forests
Crooked River National Grassland

Oregon Volcanoes

Sand Mountain Volcanic Field

SUMMARY

Type: chain of cinder cones
Activity: extinct
Last Eruption: about 1,900 yrs ago ???
Rock Type: basalt to basaltic andesite
Eruptive Volume: ?
Latitude of field: 44.25 N to 44.44 N
Longitude of field: 121.88 W to 121.95 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

Sand Mountain Volcanic Field Photo Menu

GEOLOGIC BACKGROUND:

The Sand Mountain volcanic field (cinder cones and associated lava fields) is located near the western margin of the High Cascades of central Oregon. There are two intersecting nearly north-south alignments with over 20 cinder cones.

The following are included within this volcanic field:

• Lost Lake Group
• Little Nash Crater
• Nash Crater
• Central Group
• Sand Mountain Cones
• South Group
• Inaccessible Cone
• Twin Craters

HISTORIC ACTIVITY:

• None

DATA SOURCE:

• Taylor, 1965
  

ADDITIONAL INFORMATION