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An accurate record of volcanic ash fall deposition as characterized by dispersed organic matter in a lower Permian tonstein layer (Faxinal Coalfield, Paraná Basin, Brazil) by M.W. SIMAS, M. GUERRA-SOMMER, J.G. MENDONÇA FILHO, M. CAZZULO-KLEPZIG, M.L.L. FORMOSO, I. DEGANI-SCHMIDT
Published 2013-07-01
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