Heading in Lava Lake and flowing SW to the Noxapaga River 7.5 mi NE of the confluence of the Noxapaga River and Turner Creek, 25 mi. W of Imuruk Lake, Seward Peninsula High. 6 miles long.
Reported in 1950 by D. M. Hopkins, U.S. Geological Survey (USGS); so named because "the south bank consists of an andesite flow throughout most of the length of the stream." Andesite is a specific type of lava.