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Three Fingered Jack

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Three Fingered Jack had one glacier that was unofficially called Jack glacier. It flowed on the east side of the volcano and deposited a large end moraine.

The U.S.G.S. never put this glacier on the map (see at left) despite the maps being based on photographs from the 1950s when the glacier clearly existed was noted by local hiking trails

Jack glacier disappeared after the 1980s. It left a prominent end moraine with a lake dammed behind the moraine.