Anari and tapirapua jurassic formations, western Brazil: paleomagnetism, geochemistry and geochronology - Montes, Célia Regina; Pacca, Igor Ivory Gil; Melfi, Adolpho José; Piccirillo, Enzo Michele; Bellieni, Giuliano; Petrini, Riccardo; Rizzieri, R. (Earth and Planetary Science Letters, 1994)