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Figure 1. ODP Leg 205 Costa Rica drilling area including isochrons derived from mapped seafloor magnetic anomalies (from Barckhausen et al., 2001). Numbers indicate crustal ages in million years. Tectonic boundaries, locations of DSDP Leg 84 and ODP Leg 170 drill sites, as well as arc volcanoes (triangles) are shown. FS = Fisher Seamount, QSC = Quesada Sharp Contortion, MAT = Middle America Trench.

Figure 2 | Table of Contents