Excess Sedimentation
Excess Sedimentation
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Eruption History of Mount Hood, Oregon
Mount Hood, which has been active for at least 500,000 years, occupies a long-lived focus of volcanic activity that has produced ancestral Hood-like volcanoes for the past 1.5 million years.
Excess Sedimentation Affects River Channels
Excess sedimentation occurs in rivers and streams that head on volcanoes when huge volumes of volcanic sediment are washed far downstream by lahars and muddy floods.