“According to new research, the land bridge connecting Central and South America rose more than 10 million years earlier than originally thought” Traditionally, closure of the Panama Isthmus has been deemed responsible for the co-occurrence of two major events: The large Pleistocene glaciations and the Great American Biotic Interchange (GABI). Existing evidence indicating a ca ...[Read More]
The Panamanian Isthmus is not entirely guilty after all!
Fieldwork in northwestern Colombia, in order to recognize the nature, structure and mineral composition of fluvial deposits accumulated during the middle Miocene. Within these sediments, detrital zircons of Panamanian affinity were commonly found and used to determine an earlier land connection between Central and South America (credit: Lina Pérez-Angel).