on SE coast of Umnak I., Aleutian Islands.
HistoryDescriptive name given in 1938 by U.S. Coast and Geodetic Survey (USC&GS), "because of its remarkable resemblance to the outline of a thumb."
Amos Bay, Cemetery Cove, Geyser Bight, Hot Springs Cove, Inanudak Bay, Izhiga Cove, Partov Cove, Russian Bay, Stepanof Cove,
Beaches:Asudakix Sitxa, Qigunam-tugumaga,
Capes:Amos Point, Broken Point, Cape Kigunak, Cinder Point, Igudax, Kettle Cape, Qagalim-kadaa, Qmalgaagus Kadaa, Steeple Point, Thumb Point,
Islands:Kigul Island, Kingdaxsxan, Lone Rock, Ogchul Island, Umnak Island, Unglulagan, Vsevidof Island,
Mountains:Mountain Passes:Bottleneck Pass, Hourglass Pass,
Pillars:Streams:Geyser Creek, Utah Creek, Vermont Creek,
Valleys:Cities: