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These tables document grain-size distributions of sediment collected as part of a study on the geomorphic impacts of the March 2014 State Route 530 Landslide near Oso, Washington. This includes samples of material from the landslide deposit itself, covering a range of distinct facies present in the landslide, and samples of sand and gravel at various locations along the North Fork Stillaguamish River both upstream and downstream of the landslide. Grain size distributions of landslide material were distinguished between outwash material, till, and lacustrine material, distinct facies all present in the landslide deposit. Material coarser than 4-16 mm (sample dependent) was sieved and weighed in the field, and fine...
    map background search result map search result map Surficial Sediment Data on the North Fork Sitllaguamish River and State Route 530 Landslide near Oso, Washington Surficial Sediment Data on the North Fork Sitllaguamish River and State Route 530 Landslide near Oso, Washington