Abstract
ABSTRACT The azimuthal preferred grain orientation of Vicksburg and Pre-Vicksburg loess, Vicksburg, Mississippi, determined from photomicrographs of thin sections, ranges from 285 to 289 degrees (N 75° W-N 71° W). Imbrication determined by the same visual method for both materials ranges from 3 to 8 degrees. The azimuthal fabric mean determined by dielectric anisotropy measurements with a Shell Development Company instrument ranges from 275 to 284 degrees (N 85° W-N 76° W). Imbrication determined by the same instrument ranges from 4 to 10 degrees. Based on the thinning pattern for loess of this area, a paleowind direction of 290 degrees (N 70° W) is ascertained which conforms to the overall average fabric mean of 285 degrees (N 75° W).
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