Anatomy of an evolving island arc : tectonic and eustatic control in the south Central American fore-arc area

Hartmut Seyfried, Allan Astorga, Hubert Ammann, Claudio Calvo, Wolfgang Kolb, Hannelore Schmidt & Jutta Winsemann
The southern part of the Central American isthmus is the product of an island arc. It evolved initially as a ridge of primitive island-arc tholeiites at a collision zone between the Farallon plate and proto-Caribbean crust (Albian-Santonian). During the Campanian, a major tectonic event (most probably subduction reversal) caused décollement of different units of the former plate margin. The resulting structural high was covered by a carbonate platform. From Maastrichtian to Eocenc times continuous subduction...
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