Glacial (diabase) boulder on Diversion Ridge south of Sun River. Note scour due to wind erosion.
Dates
Date Taken
1957
Summary
Glacial (diabase) boulder on Diversion Ridge south of Sun River. Note scour due to wind erosion. Boulder sits on Rierdon shale. Hammer for scale. Sun River Canyon project. Lewis and Clark County, Montana. July 1957.
Summary
Glacial (diabase) boulder on Diversion Ridge south of Sun River. Note scour due to wind erosion. Boulder sits on Rierdon shale. Hammer for scale. Sun River Canyon project. Lewis and Clark County, Montana. July 1957.
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