Abstract
A thin, light-colored, silt-rich deposit covers soils of various ages on the California Channel Islands. The widespread distribution of this layer and data on its particle size distribution, particle morphology and mineralogy suggest that it is of aeolian origin. Examination of Landsat imagery indicates that the main source for aeolian dust is the western Mojave Desert when easterly Santa Ana winds prevail several times each year. Dust fall rates on San Clemente Island are in the range of about 28–31 g/m2/year and may reflect accelerated erosion of soil surfaces disturbed recently by human activity in the Mojave Desert.
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