publication . Article . 2006

El Edificio Antiguo de la isla de San Vicente (Cabo Verde): características del sector occidental

Huertas, María José; Hernán, Francisco; Ancochea, Eumenio; Brändle, José Luis;
Open Access Spanish
  • Published: 01 Jul 2006
  • Publisher: Sociedad Geológica de España
  • Country: Spain
A more than 1000m thick pile of basaltic lava flows and pyroclasts dipping seawards rises on the western sector of San Vicente. Several systems of dikes cut across the succession that is composed of two different sequences. The lower sequence (Lazareto Formation), about 400 m thick, is formed mainly by pahoe-hoe, frequently ankaramitic, basalt lavas and some breccias intercalated. This sequence is exposed in small hills and low rounded ridges of gentle slopes. The upper sequence (Monte Cara Formation), some 700 m thick, consisting in individually thicker basaltic lava flows with typical scoria levels is well exposed in high scarps. Numerous subvertical dikes cro...
free text keywords: Oceanic islands, Shield phase, San Vicente, Barlovento Islands, Cape Verde, Petrología

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