 Furthermore, geochronological and palaeomagnetic evidence show that the two cratons had a rotational 30° latitudinal separation in the time period of 2.78–2.77 Ga, which indicates they were no longer joined after c. 2.8 billion years ago.Vaalbara thus remained stable for 1–0.4 Ga and hence had a life span similar to that of later supercontinents such as Gondwana and Rodinia.Some palaeomagnetic reconstructions suggest a Palaeoarchaean Proto-Vaalbara is possible, although the existence of this 3.6–3.2 Ga continent can't be unequivocally proven.