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The AAPG/Datapages Combined Publications Database

Wyoming Geological Association

Abstract


Geology of Yellowstone Park Area; 33rd Annual Field Conference Guidebook, 1982
Pages 53-54

The Yankee Jim Canyon Landslide—Park County, Montana

John M. Good

Abstract

More than 5,000 years ago a landslide in Yankee Jim Canyon formed a dam 200 feet high across the Yellowstone River forming a lake which extended upstream to Gardiner, Montana. Indians camped along the lake shore 5,000 years ago. Failure of the dam was sudden as evidenced by lag boulders on the slide and giant ripples immediately downstream produced by catastrophic flooding.


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