U-Pb zircon ages from bimodal magmatic rocks in the southeastern Central Cordillera of the Colombian Andes: implications for regional correlations and tectonic models during Pangea assembly - Bustamante, Camilo; Cardona, Agustín; Bustamante, Andrés; Valencia, Victor A; Archanjo, Carlos José; Vervoort, Jeff (South American Symposium on Isotope Geology, 2014)