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The travel time interpretation of two deep seismic<br>refraction lines deployed in the northeast part of<br>Tocantins Province, Central Brazil, lead to a crustal<br>model characterized by a lateral discontinuity with an<br>upper crust with Vp of 6,2 km/s and a lower crust<br>with Vp of 7.1 km/s in Brasília Fold Belt and 6.9<br>km/s in São Francisco Craton. The Moho is around<br>40 km deep.