Variations in skewness and kurtosis in sediments from the central northeastern Irish Sea can be related to the mixing of two or more grain size populations in various proportions. Kurtosis is high and skewness pronounced where one population is dominant, but both are low where populations are subequal. Such variations occur in a fairly regular manner from west to east across the basin as a result of the deposition of successively finer grained sediments with decrease in velocity of the transporting tidal currents.

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