Orosirian Period

The Orosirian Period ( /ˌɒroʊˈsɪəriən/; Greek: ὀροσειρά, translit. oroseirá, meaning "mountain range") is the third geologic period in the Paleoproterozoic Era and lasted from 2050 Mya to 1800 Mya (million years ago). Instead of being based on stratigraphy, these dates are defined chronometrically.

The latter half of the period was an episode of intensive orogeny on virtually all continents.

Two of the largest known impact events on Earth occurred during the Orosirian. At the very beginning of the period, 2023 Mya, a large asteroid collision created the Vredefort impact structure. The event that created the Sudbury Basin structure occurred near the end of the period, 1850 Mya.

For the time period from about 2060 to 1780 Mya, an alternative period based on stratigraphy rather than chronometry, named the Columbian, was suggested in the geological timescale review 2012 edited by Gradstein et al. but as of February 2017, this has not yet been officially adopted.

The supercontinent Columbia formed at the end of this period.

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 * The Pree discover Fire
 * The Draak reach TL A
 * The Antoo Antoo are still corporeal and reach TL 3
 * The Vantax gain sentience and crawl on land
 * The Ult become self-aware
 * Orlan gate builder drones reach M-0
 * The Koken people (Pre Kermac ) discover fire
 * the Yankaahr become extinct
 * The Vaalbarians become extinct after a rapid decay and decline
 * The Pultro erect a Statue on a planet that eventually will be called Netlor and hide one of the Tokens of Power inside.