The Astoria Fan: An elongate type fan
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 cross the entire fan length; they display classic inner-fan leveed profiles but evolve into distributaries in the midfan area where 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. ?? 1984 Springer-Verlag New York Inc.
Citation Information
Publication Year | 1984 |
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Title | The Astoria Fan: An elongate type fan |
DOI | 10.1007/BF02462449 |
Authors | C.H. Nelson |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Geo-Marine Letters |
Index ID | 70000645 |
Record Source | USGS Publications Warehouse |