Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/3936
Title: The volcanotectonic evolution of Flores Island, Azores (Portugal)
Authors: Azevedo, J. M. M. 
Ferreira, M. R. Portugal 
Keywords: volcanic island; volcanic complex and unit; volcanostratigraphy; subsidence and uplift
Issue Date: 2006
Citation: Journal of Volcanology and Geothermal Research. 156:1-2 (2006) 90-102
Abstract: From the study and interpretation of the volcanic products and structures of Flores Island, we infer that its volcanic history was dominated by two major periods: (1) proto-insular volcanism, which includes all the submarine and emergent activities; and (2) insular volcanism, consisting exclusively of subaerial eruptions. The first period includes two phases: (1) the oldest (2.2 to 1.5 Ma) of shallow submarine volcanism; (2) the youngest (1.0 to 0.75 Ma) includes emergent volcanism. Throughout the second period, three volcanic stages are recognized: (1) the first one (0.7 to 0.5 Ma) includes the most voluminous volcanism, balanced between effusive and explosive events; (2) an intermediate stage (0.4 to 0.2 Ma) that involves a larger number of small-scale feeder centres, with effusive eruptions prevailing; (3) the third stage is the latest volcanic activity of the Island ([approximate] 0.003 Ma), with strombolian and subsequent phreatic and phreatomagmatic activity centred at four volcanic vents.
URI: http://hdl.handle.net/10316/3936
Rights: openAccess
Appears in Collections:FCTUC Ciências da Terra - Artigos em Revistas Internacionais

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