Heavy Minerals from the Palos Verdes Margin, Southern California: Data and Factor Analysis, USGS OFR 00-153

Heavy or high-density minerals in the 63-250-um (micron) size fraction (very fine and fine sand) were analyzed from beach and offshore sites to determine the areal and temporal mineralogic distributions and the relation of those distributions to the deposit affected by effluent discharged from the Los Angeles County Sanitation District sewage system. Heavy or high-density minerals in the 63-250-_m (micron) size fraction (very fine and fine sand) were analyzed from 36 beach and offshore sites (38 samples) of the Palos Verdes margin to determine the areal and temporal mineralogic distributions and the relation of those distributions to the deposit affected by material discharged from the Los Angeles County Sanitation District sewage system (Lee, 1994) (Figure 1).

Data presented here were tabulated for a report to the Department of Justice (Wong, 1994). The results of the data analysis are discussed in Wong (in press).