Before revision: Prior to the Canfield Ocean theory, it was believed that the ocean became oxygenated during the Great Oxygenation Event (GOE) (~2.46 Ga) .
After revision: Prior to the Canfield Ocean theory, it was believed that the ocean becoming fullyoxygenatedwas the mechanism that ceased BIF depositon during the Great Oxygenation Event (GOE) (~2.46 Ga) .