The Astoria Fan, a modern system, is located on a subducting oceanic crust and fills a north-south-trending trench along the Oregon continental margin. Well-developed channels across the entire fan length; they display classic inner-fan leveed profiles but evolve into distributaries in the midfan area as the gradient decreases sharply. During periods of low sea level, inner- and middle-fan channels funnel sand to distal depositional sites in the outer-fan area where the sand/shale ratios are highest. This pattern of sand displacement and efficiency of transport appears to be characteristic of elongate fans fed by a major river and submarine canyon.

West: -126.2048 East: -116.3500 North: 46.2000 South: 42.0000

West: NaN East: NaN North: NaN South: NaN

Expedition: 18

Site: 18-174

Provider: SEDIS Publication Catalogue

Data set link: http://sedis.iodp.org/pub-catalogue/index.php?id=1985-009010 (c.f. for more detailed metadata)

This metadata in ISO19139 XML format