Related Overviews


'Orosirian' can also refer to...


More Like This

Show all results sharing this subject:

  • Earth Sciences and Geography


Show Summary Details

Quick Reference

A period of the Proterozoic eon that began 2050 Ma ago and ended 1800 Ma ago, both dates being fixed. The Orosirian followed the Rhyacian period and was followed by the Statherian period.

Subjects: Earth Sciences and Geography.

Reference entries

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.