Subduction subduction zone 14 Andes 12 tectonic setting 12 slab 10 subduction 10 Tectonics 8 Jurassic 7 Argentina 6 Chile 6 Patagonia 6 backarc basin 6 continental margin 6 Rifting 4 Seismic waves 4 South America 4 Southern Ocean 4 Thermomechanical model 4 Weddell Sea 4 collision zone 4 continental breakup 4 deformation 4 extensional tectonics 4 formation mechanism 4 hot spot 4 large igneous province 4 numerical model 4 plate boundary 4 plate motion 4 rifting 4