Depositional environment of the Quebradagrande complex : implications for the early to mid-Cretaceous tectono-magmatic evolution of the northern Andes

The sedimentary and volcano-sedimentary rocks of the Quebradagrande Complex on the northwestern margin of South America record the arc and its associated back-arc tectonic settings. Sixteen thin sections were analyzed revealing distinct lava facies from basic to intermediate compositions. Field rela...