30 million years of Permian volcanism recorded in the Choiyoi igneous province (W Argentina) and their source for younger ash fall deposits in the Paraná Basin: SHRIMP U–Pb zircon... von Rocha-Campos, A.C., Basei, M.A., Nutman, A.P., Kleiman, Laura E., Varela, R., Llambias, E., Canile, F.M., da Rosa, O. de C.R.

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