An extensive, apparently monogenic, debris-flow deposit in the Basse-Terre-St. Claude area of southern Guadeloupe is contemporaneous with pyroclastic surge deposits that cover an area of at least 60 km2. These 3,000-yr-old deposits were emplaced by the avalanching of a sector of Soufrière volcano and an associated directed blast similar to the 1956 Bezymianni and the May 18, 1980, Mt. St. Helens eruptions.

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