Sediment Movement on the Continental Shelf near Washington and Oregon

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Science  18 Nov 1966:
Vol. 154, Issue 3751, pp. 879-885
DOI: 10.1126/science.154.3751.879


The nuclides zinc-65 and cobalt-60 associated with river-borne particulate matter are incorporated in sediment on the Continental Shelf near the Colum- ia River. Changes in the relative concentrations of zinc-65 and cobalt-60 and in the ratio of the activity of zinc-65 and cobalt-60 suggest that radioactive sediment moves northward 12 to 30 kilometers per year along the shelf and 2.5 to 10 kilometers per year westward away from the coast.