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Full-Text Articles in Volcanology
Characterization Of The Initial Explosive Phases Of The 2021 Eruption At La Soufriere, St. Vincent, Sydney Walters
Characterization Of The Initial Explosive Phases Of The 2021 Eruption At La Soufriere, St. Vincent, Sydney Walters
Honors Theses
The Soufriere Volcano on St. Vincent Island, in the Lesser Antilles volcanic arc, is one of the most active subaerial volcanos in the Caribbean, erupting both explosively and effusively at least 7 times in the last 500 years. In December of 2020, the volcano began erupting effusively, showing no evidence of degassing and on April 9th of 2021, it transitioned to an explosive eruption that continued until April 22, with more than 30 eruptions classified as Vulcanian and sub-Plinian. Scoria samples from three units (U1-U3) erupted in the first 48-72 hours of the explosive eruptive phase were analyzed in …
Correlation Of The Andesitic Ignimbrites Of Northern Dominica Lesser Antilles Caribbean, Lauren Main
Correlation Of The Andesitic Ignimbrites Of Northern Dominica Lesser Antilles Caribbean, Lauren Main
Honors Theses
Dominica, a 750 km2 island in the Lesser Antilles volcanic arc, has numerous volcanic centers. One of the more active volcanoes is Morne Diablotins, the proposed source of the Grande Savanne ignimbrite. However, reconnaissance geologic mapping suggests that several other pyroclastic deposits in northern Dominica erupted from Morne Diablotins (Smith and Roobol, 2013): Wesley ignimbrite, Bense ignimbrite, and Pointe Ronde ignimbrite. The Grande Savanne deposit is ~70 m thick and includes a block and ash flow overlain by a baked ash layer, and welded and unwelded tuff. The Wesley ignimbrite is a ~27 m thick, layered deposit with a basal …
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 …