Нова-Игуасу
The first scientific article concerning Nova Iguaçu geology was published in 2006. In the article, and at several scientific events, Akihisa Motoki presented a case against the existence of a volcano at Nova Iguaçu, showing that the geology and morphology of Nova Iguaçu are incompatible with the volcanic model. No article defending the volcano hypothesis has been published in a qualified scientific journal.