The tectonic setting of central Panamá has been controlled primarily by the collision of the Central American Arc with the South American continent, beginning in Miocene time (e.g., Coates et al., 2004). Ongoing collision at a rate of about 25  mm/yr has been inferred using campaign‐style Global Positioning System (GPS) surveys from a sparse, long‐baseline network covering the collision zone (e.g., Trenkamp et al., 2002; Fig. 1). The central portion of the Panamá block (Figs. 1 and 2) is commonly described as a nondeforming microplate (e.g., Trenkamp et al., 2002; Bird, 2003...

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