The positive correlation between Al/Si X-ray flourescence intensity ratios determined during the Apollo 15 lunar mission and a broad-spectrum visible albedo of the moon is quantitatively established. Linear regression analysis performed on 246 1¿ geographic cells of X-ray fluorescence intensity and visible albedo data points produced a statistically significant correlation coefficient of .78. Three distinct distributions of data were identified as 1)within one standard deviation of the regression line, 2)greater than one standard deviation below the line, and 3)greater than one standard deviation above the line. The latter two distributions of data were found to occupy distinct geographic areas in the Palus Somni region. It is proposed that dark material deposited southwest of Palus Somni probably caused the anomalous distribution of data greater than one standard deviation below the regression line, and that bright material recently deposited northeast of Palus Somni probably caused the distribution of data greater than one standard deviation above the regression line.