Hermann Dario Bermudez¹, Vivi Vajda², Francisco J Vega³, Jose Antonio Arz⁴, Ignacio Arenillas⁴, Timothy J Bralower⁵, Paul R. Renne⁶, Jose Vicente Rodriguez⁷, Maria Ximena Zorrilla⁸ and Vicente Gilabert⁴, (1)Grupo de Investigacion Paleoexplorer, McKinney, TX, United States, (2)Swedish Museum of Natural History, Department of Palaeobiology, Stockholm, Sweden, (3)Universidad Nacional Autonoma de Mexico, Instituto de Geologia, Mexico City, Mexico, (4)Universidad de Zaragoza, Departamento de Ciencias de la Tierra, Zaragoza, Spain, (5)Pennsylvania State University Main Campus, Geosciences, University Park, PA, United States, (6)Berkeley Geochronology Center, Berkeley, CA, United States, (7)Grupo de Investigacion Paleoexplorer, Bogota D.C, Colombia, (8)Parques Nacionales Naturales de Colombia, Parque Nacional Natural Gorgona, Cali, Colombia