Snow-covered Little Sitkin volcano rises beyond Williwaw Cove on the NW side of the island. The sharp-topped unnamed peak at the left is part of the Williwaw Cove Formation, consisting of Tertiary to Quaternary lava flows. Two nested calderas lie between this peak and historically active Little Sitkin; the younger of these may be of early Holocene age. The older Pleistocene caldera, whose low rim lies just beyond the thin cloud bank in the center, may have once contained a caldera lake. Photo by Steve Ebbert, 2000 (U.S. Fish and Wildlife Service).