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- Title
Recent ventifact development on the central Oregon coast, western USA .
- Authors
Knight, Jasper; Burningham, Helene
- Abstract
Reports that the unusual location of ventifacts, on a boulder-built jetty at the mouth of the Siuslaw River, Oregon coast, western USA, allows ventifact age and wind abrasion rates to be estimated with some precision. Consideration of historical shoreline position and the history of jetty construction and repair that suggests the ventifacts have formed since about 1930; Morphologically the ventifacts that are aligned south-to-north reflecting winter winds and sediment transport from the adjacent beach; Wind-parallel grooves and ridges with sharp, sinuous crests that are developed on inclined boulder surfaces on top of the jetty and reflect suspended sand transport in wind vortices; Deeply pitted surfaces on steep boulder surfaces nearest the beach that reflect impact by saltating sand grains; Southerly winds above the sand transport threshold that occur; Wind abrasion rates that are calculated; Estimate of ventifact age and ventifaction rate from a modern coastal environment.
- Subjects
OREGON; UNITED States; VENTIFACT; WINDS; SEDIMENTS; COASTAL ecology; RIVERS
- Publication
Earth Surface Processes & Landforms, 2003, Vol 28, Issue 1, p87
- ISSN
0197-9337
- Publication type
Article
- DOI
10.1002/esp.432