“proterozoic”*eon 3*
NEOPROTEROZOIC MESOPROTEROZOIC PALEOPROTEROZOIC “PROTEROZOIC”(“eon #3”)(2 billion years) . (pronunciation:/ˌproʊtərəˈzoʊɪk, prɔː-, -trə-/[1][2]) . *the proterozoic is a ‘geological eon’ representing the time just before the proliferation of ‘complex life’ on ‘earth’* […]