Rounded knobs and "pinnacles" (spires of rock) rise above the headwater area of Condor Gulch. Spheroidal weathering of the volcanic rock gives rise to this unique landscape.
U.S. Department of the Interior - U.S. Geological Survey - Geology Discipline Privacy statement -- General disclaimer -- Accessibility This page is <http://3dparks.wr.usgs.gov/Pinnacles/> Maintained by Webmaster, Menlo Park, CA Last modified Mon 3/18/2003