The clay mineralogy of beach sands is in general similar to that of nearby samples from other environments except for the occurrence of the mineral talc in the <2mu fractions from some of the beach sands and from closely adjacent areas, but from no other bottom samples in the NE. Gulf of Mexico area. No conclusions are reached regarding the significance of the occurrence of talc in only the beach samples. The mineral usually is most abundant in samples which contain little clay matter, but this is apparently not a controlling factor. Possibly physical processes peculiar to the swash area such as sand flotation combined with the flaky habit and chemical resistance of talc produce the concentration noted in the beach material.