Geology of southeastern Venezuela

Abstract

F i g u r e 1 . A u y à n -T e p u i F r o m t h e S o u t hF i g u r e 2 . M o u n t R o r a i m a (S o u t h S i d e )Upper part composed of sedim ents; lower slopes of quartz gabbro.

Heavy mineral record of Andean uplift and changing sediment sources across the NE margin of South America: a case study from Trinidad and Barbados

“…van Andel & Postma 1954;Barr et al 1958;Nota 1958;van Andel 1958;Jones 1968;Baldwin et al 1986;Goldstein et al 1997;Algar 1998;Pindell et al 2005). The Shield comprises approximately 35 000 km 2 of exposed Archaean, Precambrian and Palaeozoic crystalline continental basement rock at an estimated thickness greater than 2400 m across portions of eastern Venezuela, Guyana, Suriname, French Guyana and northern Brazil, including the basement complex below the Barinas-Apure -Llanos basins (Lopez et al 1942;Edmond et al 1995). Rock types consist of numerous intrusive and extrusive igneous rocks of both continental and oceanic origin, variably metamorphosed in successive deformation events, intercalated with continental sandstones and quartzites (Almeida 1978;Santos et al 2000).…”