Stenian facts for kids
The Stenian is the last geological period in the Mesoproterozoic. It began 1.2 billion years ago, and ended at 1 billion years ago. Before it was the Ectasian. It is followed by the Tonian.
The supercontinent Rodinia began forming in this period. Fossils of the first known sexually-reproducing eukaryotes are found at the end of the previous period in the Hunting Formation on Somerset Island, Nunavut, Canada.
This period includes the Keweenawan Age at about 1100 mya.
Precambrian (4.567 gya – 541 mya) | |
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In the left column are Eons, bold are Eras, not bold are Periods. gya = billion years ago, mya = million years ago | |
Hadean (4.567 gya – 4 gya) | Chaotian Zirconian |
Archaean (4 gya – 2.5 gya) | Eoarchaean (4 gya – 3.6 gya)
Palaeoarchaean (3.6 gya – 3.2 gya) |
Proterozoic (2.5 gya – 541 mya) | Palaeoproterozoic (2.5 gya – 1.6 gya) Siderian (2.5 gya – 2.3 gya) Rhyacian (2.3 gya – 2.05 gya) Orosirian (2.05 gya – 1.8 gya) Statherian (1.8 gya – 1.6 gya)
Mesoproterozoic (1.6 gya – 1 gya) Calymmian (1.6 gya – 1.4 gya) Ectasian (1.4 gya – 1.2 gya) Stenian (1.2 gya – 1 gya) Neoproterozoic (1 gya - 541 mya) Tonian (1 gya – 720 mya) Cryogenian (720 mya – 635 mya) Ediacaran (635 mya – 541 mya) |
See also
In Spanish: Período Esténico para niños