Abuur nooc ka mid ah weedhan adag ee Cromerian Complex ee Yurub waxaa loo qaybiyaa 3 xilli baraf ah iyo 4 xilliyo baraf ah.
Dabcan, nooc ka sii adag jumlada ayaa ah "Cromerian Complex ee Yurub waxaa hadda loo qaybiyaa 3 xilli baraf ah iyo 4 xilliyo baraf u dhexeeya, kuwaas oo u dhigma heerarka Isotope Marine 13 ilaa 21".