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Olenekian Stage
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Chart showing the Triassic period within the Mesozoic era, listing its division into Lower, Middle, and Upper epochs, with corresponding ages such as Induan, Olenekian, Anisian, Ladinian, Carnian, Norian, and Rhaetian, and marking boundaries in millions of years ago. A detailed geologic time scale chart displaying Earth's history from the Hadean Eon over 4.5 billion years ago to the present, organized by eons, eras, periods, epochs, and ages with color-coded columns and corresponding dates in millions of years.
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Chart showing the Triassic period within the Mesozoic era, listing its division into Lower, Middle, and Upper epochs, with corresponding ages such as Induan, Olenekian, Anisian, Ladinian, Carnian, Norian, and Rhaetian, and marking boundaries in millions of years ago.
Triassic Period in geologic time The Triassic Period and its subdivisions.

Olenekian Stage

stratigraphy
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History

Olenekian Stage, upper of two divisions of the Lower Triassic Series, representing those rocks deposited worldwide during Olenekian time (251.2 million to 247.2 million years ago) in the Triassic Period. The stage name is derived from the Olenyok, or Olenek, River of Siberia. The stratotype for the Olenekian, which was defined in 1956, is the strata in the lower course of the Olenyok River that rest upon deposits of the Induan Stage and that are...

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