Southwestern Rhode Island beach sands are composed of a great variety of minerals, the most common of which are amphiboles, chlorite, garnet, staurolite, and black opaques in the heavy fraction and feldspars and quartz in the light fraction. Counts of these fractions from samples collected at 1-mi. intervals were used as basic data for multivariate and trend analyses. Character of source materials and pattern of beach drift are believed responsible for areal differences in mineral composition. Distribution of certain selected minerals indicates that major sand movement trends are convergent toward the center section of this stretch of beaches.

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