Eroded andesitic stratovolcanoes to the north east of the depression include Mt. Gimie, Piton St Esprit, and Mt. Grand Magazin, all greater than 1 Ma in age. Andesitic and dacite pyroclastic flows from these volcanoes are found at Morne Tabac dome (532 ka), Morne Bonin dome (273 kya), and Bellevue (264 kya). Avalanche deposits from the formation of the Qualibou depression are found offshore, and in the massive blocks of Rabot, Pleisance, and Coubaril. The dacitic domes of Petit Piton (109 kya) and Gros Piton (71 kya) were then extruded onto the depression floor accompanied by the Anse John (104 kya) and La Pointe (59.8 kya) pyroclastic flows. Later, pyroclastic flows include pumice-rich Belfond and Anse Noir (20 kya). Finally, the dacitic domes of Terre Blanche (15.3 kya) and Belfond (13.6 kya) formed within the depression.