Eric Walker added Proterozoic - Wikipedia to Proterozoic eon

Eric Walker added a number of topics and a number of links to Geologic time scale (GTS), and added Geologic time scale (GTS) to Geology and History, prehistory and geologic time

Eric Walker added Ediacaran period and Neoproterozoic - Wikipedia to Neoproterozoic era, and added Neoproterozoic era to Proterozoic eon

Eric Walker added Neoproterozoic era and Proterozoic - Wikipedia to Proterozoic eon, and added Proterozoic eon to Geologic time scale (GTS)