Description
E of Kennicott Glacier,4 mi. NE of Mccarthy, Wrangell Mts.
History
Local name reported in 1908 by D.C. Witherspoon (Moffit and Capps, 1911, pl. 3), U.S. Geological Survey (USGS). So named because the mountain is largely composed of porphyry, a type of igneous rock.