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A convenient method has been developed for the determination of colors of wet and powdered marine sediments. The colors of the sediments are determined with a simple colorimeter and described in the second CIE 1976 color space (L*a*b* color space) . This method can sensitively detect color differences impossible to detect by the naked eye for wet and powdered sediment samples . It generally gives standard deviations of about 3% for replicate determinations of L*a*b* values for powdered samplesdoi:10.2343/geochemj.25.187 fatcat:d6ydrayzrjeendzoag4s3pfmcy