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Rosetta Stones

Oso Mudslide: Links to the Geology Behind the Tragedy

Aerial photo showing the extent of the slide. Courtesy Gov. Jay Inslee via Flickr. (CC BY-ND 2.0)

On Saturday, the Seattle region experienced one of the worst landslide disasters in its history. A lot of the hills around here are unconsolidated glacial deposits, and they’re ready to fall at the slightest provocation. Heavy rains and a river determinedly eroding the toe of a previous slide, possibly combined with some unwise land use [...]

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