Part of the Neoproteimeran Era
Neogalactic Period - Nephelean Period - Erebrean Period
The Nephelean Period is the first period of the Neoproteimeran Era and the fifth period of the Proteimeran Eon. The Nephelean begins with the formation of the solar system - or, more specifically, the solar nebula becoming a closed system with respect to the Giant Molecular Cloud - and ends with the formation of the proto-Sun which had yet to emit light at the time.
The Nephelean is not further subdivided into epochs.
Nephelean Timescale:
Nephelean Period - 4680-4630 MYA