<p>Written on front: Cascade Pass, Cascade Range, Washington. View from an elevation of about 7,500 feet southeastward down the Stehekin Valley. The mountain summits fall into a general plane, which was a lowland of late Pliocene time and is now elevated 8,000 feet above sea and profoundly dissected.
PH Coll 1415.22</p>
<bdi><a href="https://en.wikipedia.org/wiki/en:Bailey_Willis" class="extiw" title="w:en:Bailey Willis"><span title="American geologist">Bailey Willis</span></a>
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<a rel="nofollow" class="external text" href="http://content.lib.washington.edu/epicweb/index.html">Glaciers and Landforms Photograph Collection</a>