The <a href="//commons.wikimedia.org/wiki/Chiwaukum_Mountains" title="Chiwaukum Mountains">Chiwaukum Mountains</a> in the Chelan quadrangle, looking south. In the middle ground is Larch Lake, a glacial <a href="//commons.wikimedia.org/wiki/Tarn" title="Tarn">tarn</a> carved from Chiwaukum <a href="//commons.wikimedia.org/wiki/Schist" class="mw-redirect" title="Schist">Schist</a> of the Nason terrane. The distant peaks are underlain by the <a href="//commons.wikimedia.org/wiki/Mount_Stuart" title="Mount Stuart">Mount Stuart</a> <a href="https://en.wikipedia.org/wiki/batholith" class="extiw" title="w:batholith">batholith</a> and rocks of the Ingalls Tectonic Complex.
USGS
12 October 2004 (original upload date)
<a rel="nofollow" class="external free" href="https://geopubs.wr.usgs.gov/i-map/i1661/">http://geopubs.wr.usgs.gov/i-map/i1661/</a>