Radiometric age determination of tonsteins and stratigraphic constraints for the Lower Permian coal succession in southern Paraná Basin, Brazil

Margót Guerra-Sommer, Miriam Cazzulo-Klepzig, João Orestes Schneider Santos, Léo Afrâneo Hartmann, Marcelo Ketzer, M. L. L. Formoso

International Journal of Coal Geology · 2007 · 83 citations · 35 references

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