Craters of the Moon Volcano - John Seach


Idaho, USA

43.42 N, 113.50 W
summit elevation 2005 m
Cinder cones

Craters of the Moon lies at the NW part of the eastern Snake River Plain, Idaho. The volcanic field contains at least 60 lava flows, 25 cinder cones, and 8 eruptive fissure systems. It covers an area of 1600 sq km, and is the largest lava field in the Snake River Plain.

Craters of the Moon formed in 8 eruptive periods lasting several hundred years each. The first eruptions began 15,000 years ago, and the most recent eruptions ended 2100 years ago.

Lava output rate was 1.5 cubic km/1000 years for the period 15,000 to 7,000 years ago. From 7,000 to 2,000 years ago the rate increased to 2.8 cubic km/1000 years.

The Great Rift
The Great Rift is an 85 km long, 2-8 km wide rift in the Snake River Plain.

Craters of the Moon Volcano Eruptions

2,000-15,000 years ago.