Sediment Movement on the Continental Shelf near Washington and Oregon

Abstract

The nuclides zinc-65 and cobalt-60 associated with river-borne particulate matter are incorporated in sediment on the Continental Shelf near the Columbia 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.

Baseline and projected future carbon storage and greenhouse-gas fluxes in ecosystems of the Western United States

“…For example, the relatively steep bathymetry prevents the formation of a distinct accreting delta for the fourth largest river in the United States, the Columbia River. Instead, sediment from the Columbia River is deposited in deeper waters, relatively far from the mouth (Gross and Nelson, 1966;Sternberg, 1986). The Western United States possesses additional physiographic characteristics, however, that do act to increase the storage of carbon.…”

Holocene geologic history of the Clatsop Plains foredune ridge complex

“…Sediment sources and dispersal patterns were investigated by many including Gross and Nelson (1966), Scheidegger et al, (1971) and Fox and Davis (1974).…”

Marine geology of the continental margin off southern Oregon

“…Neudeck (1970) During the winter months wave directions due to sea are from the south-southwest ( Figure 41); however, the prevailing swell comes from the south-southwest a majority of the time only during January and February (Kulm and Byrne, 1966 (Gross and Nelson, 1966;Gross, et al . , 1967) and heavy mineral patterns (Kulm, et al .…”