In fact, before some fossil discoveries were made late in the ... this includes all of geological time prior to the Cambrian period. Hadean Era (4,550-3,850 mya) The Precambrian's oldest era ...

The oldest geological record is the Hadean detrital zircons in the metamorphosed ... abundant Meso-Neoproterozoic stromatolite and micropaleoflora fossils. The Lhasa terrane is located at the ...