RT Journal Article
T1 El Edificio Antiguo de la isla de San Vicente (Cabo Verde):características del sector occidental
A1 Huertas Coronel, María José
A1 Hernán, F.
A1 Ancochea Soto, Eumenio
A1 Brandle, J.L.
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.
PB Sociedad Geológica de España
SN 0213-683X
YR 2006
FD 2006-07
LK https://hdl.handle.net/20.500.14352/50436
UL https://hdl.handle.net/20.500.14352/50436
LA spa
NO BTE2003-02153
NO CGL2004-02175
NO PR27/05-13868-
NO CGL2005-24183E
DS Docta Complutense
RD 22 abr 2025