Broterosoyig

Broterosoyig waa eon oo ka dhigan muddo ka hor dillaaca nolosha adag ee ugu horreysa ee Dhul.  Muddadani waxay socotay 2500 ilaa 542 (± 1) milyan sano ka hor waxayna qayb ka ahayd xilligii Brakambriyaan.  Broterosoyig-ku waxa uu ka kooban yahay saddex xili oo isku xiga kuwa ugu da'da weyn: Balyuubroterosoyig, Mesobroterosoyig, iyo Neobroterosoyig.

Tixraac
 Stanley, Steven M. (1999). Earth System History. New York: W.H. Freeman and Company, 315. ISBN 0-7167-2882-6.
Proterozoic