A dust storm originating in the interior of the United States was sampled as it crossed the east coast. The quantity of dust transported by this storm to the North Atlantic is estimated to be on the order of a million metric tons. Illite was the dominant clay mineral in the dust which also contained chlorite, kaolinite, quartz and feldspar. Most of the material was less than 2 mu in size. Based on these results it is concluded that atmospherically-transported materials represent an important contribution to presently accumulating North Atlantic sediments.