Proterozoic

Rank	eon· Paleobiology Database
Base	2500 Ma· Paleobiology Database
Top	539 Ma· Paleobiology Database
Duration	1961 Myr· Paleobiology Database
Chart	ICS International Chronostratigraphic Chart v2023/09 (ages from Macrostrat/PBDB interval tables)

Elsewhere

PBDB: 752
ICS chart (stratigraphy.org)
Wikipedia: Proterozoic

Cite this article

Stratum Study. "Proterozoic" (Time interval). Stratum Study pack 2026.09, as of 2026-09-19. https://stratum.black/study/time/proterozoic. Accessed 2026-09-20.

BibTeX · CSL-JSON

@misc{stratum-proterozoic,
  title        = {Proterozoic},
  author       = {{Stratum Study}},
  howpublished = {\url{https://stratum.black/study/time/proterozoic}},
  year         = {2026},
  note         = {Time interval article, Stratum Study pack 2026.09, as of 2026-09-19; sources: stratum, pbdb. Accessed 2026-09-20.}
}

Citations carry the pack version and the article's as-of date so they resolve to the same text later. The facts themselves belong to the sources listed below; cite those for the science.

Contains

Elsewhere