Forest-covered Brockman Flat, formed by lava flows from a chain of cinder cones in the Eagle Lake volcanic field, extends into Eagle Lake. The cinder cones, out of view to the right, were formed along N-S-trending faults within the Eagle Lake volcano-tectonic depression, whose SE margin forms the peaks beyond Eagle Lake. The flows from the depression represent the southernmost late-Quaternary magmatism associated with backarc spreading in the NW Great Basin.

Photo by Lee Siebert, 1998 (Smithsonian Institution).

This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.

Eagle Lake Field