borah quake fault scarp lines |
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navigate by keyword : 1983 adjacent along borah challis dropped earth earthquake fault feet geologic geology idaho leaving lifted lines lost mackay magnitude7 mountain mountains peaks quake range river rocks scar scarp science tectonic valley |
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The Magnitude-7 Borah Earthquake of 1983 lifted Mt. Borah by 1 ft 30 cm and dropped the adjacent Lost River Valley by 8 feet 2.4 m, leaving fault scarp lines along the mountain range. |
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