Linked from
The 18 pages that link to Precambrian, each with the reason it gives.
CratonNarrower topic: Most cratonic basement formed during this immense early interval.
LaurentiaNarrower topic: Most of Laurentia’s basement formed during this vast interval.
StromatoliteNarrower topic: Most known ancient stromatolites formed during this vast interval.
Western PlateauNarrower topic: Most bedrock across the plateau formed during this vast interval.