 The oldest diamonds derived from the mantle were between 3.5 and 3.3 Ga, which suggest that the Slave Protocraton would have formed a thick crustal root by this time.The main stabilization of the Slave craton occurred in the Neoarchean at ~2.75 Ga as noted by an abundance of peridotite formation The Kaapval Craton showed a similar peak age of growth which may suggest that much of the earth's continental lithospheric mantle was formed in the Neoarchean The formation and stabilization of the continental lithospheric mantle and the evolution of the crust are closely related during the period between 2.8 and 2.0 Ga.Attempts to reconstruct the craton's tectonic history have focused extensively on the east–west asymmetry.