Postglacial vegetation on Umnak Island, Aleutian Islands, Alaska

Abstract

Pollen analyses of a peat section, 9,945 ± 320 radiocarbon years of age from Umnak Island in the eastern Aleutians, point to a tripartite sequence of postglacial plant communities beginning with a sedge-grass tundra, followed by an interval of willow dominance (8,500 - 3,500 years ago), and ending with a grass-sedge tundra. © 1973.