formed. Sleaford Orogeny on Australian Continent , Gawler Craton 2440-2420 Ma . 2500 [27] Archean [26] Neoarchean [26] Stabilization of most modern cratons ; possible mantle overturn event. Insell Orogeny, 2650 ± 150 Ma . Abitibi greenstone belt in present-day Ontario and Quebec begins to form, stablizes by 2600 Ma .