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Correlating Monotonous Crystal-Rich Dacitic Ignimbrites In Dominica: The Layou And Roseau Ignimbrite, Alexandra Flake
Correlating Monotonous Crystal-Rich Dacitic Ignimbrites In Dominica: The Layou And Roseau Ignimbrite, Alexandra Flake
Honors Theses
Dominica is a small island in the Lesser Antilles island arc. It has the highest concentrations of potentially active volcanoes in the world and features several large Pleistocene pyroclastic deposits that extend to the sea. Two of the ignimbrites emanate from central Dominica, with pyroclastic deposits filling the Layou and Roseau river valleys. Based on topography, the Layou Ignimbrite is believed to be from Morne Trois Pitons, whereas the Roseau Ignimbrite is derived from vents in the Wotten Waven region. On the coast in the village of Layou, the Layou Ignimbrite is 13 m thick with a basal large block …