RT Journal Article
T1 El Edificio Antiguo de la isla de San Vicente (Cabo Verde): características del sector occidental
T1 The Old Edifice of San Vicente Island (Cape Verde): features of the western sector
A1 Huertas, María José
A1 Hernán, Francisco
A1 Ancochea, Eumenio
A1 Brändle, José Luis
AB A more than 1000m thick pile of basaltic lava flows and pyroclasts dipping seawards rises on the westernsector of San Vicente. Several systems of dikes cut across the succession that is composed of two differentsequences. 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 hillsand 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 cross the entire succession. The dikes vary increasingly their strike from southto north. Frequent sills (one every 3-5 m) also intrude the lower sequence. The distribution of the lava flowdip strikes as well as the dike strikes suggests that the succession as a whole was part of a central volcanicedifice, of which the eruptive centre was once located south of the city of Mindelo. This giant volcanicedifice, 16-20 km in diameter and 1600-2000m high, would have extended off the present coast. Accordingto the radiometric ages obtained the volcano built up between 6,1Ma and 4,6 Ma with maximum activityconcentrated between 5,5 and 5 Ma
YR 2006
FD 2006
LK http://hdl.handle.net/10272/8566
UL http://hdl.handle.net/10272/8566
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026