Three kinds of marine shore-line energy environments were identified from the results of factor analysis of the grain-size distributions of 69 samples of sediment collected from Barataria Bay, La., by Krumbein and Aberdeen (1937). The environments are: surf energy dominant, current energy dominant, and gravitational energy dominant. Factor analysis, as illustrated, offers a more objective method of studying, comparing and interpreting grain-size distributions of sediments than does the correlation of such arbitrary statistical measures as skewness and kurtosis. Input consisted of the weight percent of sediment in each of the same ten size classes for each of the samples.

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