volcaniclastic deposit Argentina 28 Patagonia 12 South America 10 basalt 10 paleoenvironment 10 volcanism 10 depositional environment 8 depositional sequence 8 fold and thrust belt 8 paleoclimate 8 Miocene 6 Neogene 6 Neuquen 6 Paleozoic 6 provenance 6 transgression 6 volcanic ash 6 Arroyo Ranquil Huao 4 Bancalari 4 Basalts 4 Caldera 4 Catan Lil 4 Copahue-Pino Hachado Block 4 Cretaceous 4 Extrandean Patagonia 4 Jurassic 4 Pampean sediments 4 Patagonian Andes 4 Petrofacies 4