The flat summit of Little Nash Crater, a scoria cone of the Sand Mountain volcanic field in the central Oregon Cascades, has been extensively quarried to provide aggregate for highway construction. Red oxidized scoria from Little Nash Crater can be seen in road surfaces in the Santiam Pass area.

Photo by Lee Siebert, 1995 (Smithsonian Institution).

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

Sand Mountain Field