Early in 1959 the International Cooperation Administration requested the U. S. Geological Survey to assign a geologist to a reconnaissance study of the pumice and pozzolan deposits of the Lesser Antilles. As a result, I made brief field examinations of all the reported deposits during the period May 25 - June 23, 1959. In company with Mr. Peter Martin-Kaye, Government Geologist, Windward Islands, headquartered at Castries, St. Lucia, I examined potential pumice and pozzolan deposits in Grenada, Dominica, St. Vincent and St. Lucia. With Dr. Percy C. Henriquez of the Technical-Economic Council, Netherlands Antilles, headquartered in Curacao, I saw those of St. Eustatius. I also visited pumice deposits on Martinique, in company with Mr. Edward T. Foster, Vice President of Meekins West Indies Company of Hollywood, Fla. Short visits were made to the islands of Antigua, Barbados, Nevis, St. Kitts, and Trinidad, partly to meet the necessities of inter-island transportation and partly to get some idea of the actual or potential mineral resources of these islands.