Towards Columbia: paleomagnetism of 1980–1960 Ma Surumu volcanic rocks, Northern Amazonian Craton - Bispo-Santos, Franklin; D'Agrella Filho, Manoel Souza; Janikian, Liliane; Reis, Nelson Joaquim; Trindade, Ricardo Ivan Ferreira da; Reis, Maria Anna A. A. (Precambrian Research, 2014)