Stenian

Stenian Period 1200–1000 million years ago PreЄ Є O S D C P T J K Pg N

The Stenian Period (from Greek stenos, "narrow") is the final geologic period in the Mesoproterozoic Era and lasted from 1200 Mya to 1000 Mya (million years ago). Instead of being based on stratigraphy, these dates are defined chronometrically. The name derives from narrow polymetamorphic belts formed over this period.

The supercontinent Rodinia assembled during the Stenian. It would last into the Tonian period.

This period includes the formation of the Keweenawan Rift at about 1100 Mya.^[1]

Notes

↑ "Organic geochemical study of mineralization in the Keweenawan Nonesuch Formation at White Pine, Michigan" (PDF). University of Michigan. Retrieved 28 September 2011.

References

"Stenian Period". GeoWhen Database. Archived from the original on May 12, 2006. Retrieved January 5, 2006.
James G. Ogg (2004). "Status on Divisions of the International Geologic Time Scale". Lethaia. 37 (2): 183–199. doi:10.1080/00241160410006492.

Proterozoic Eon

Preceded by Archean Eon

Paleoproterozoic Era	Siderian Rhyacian Orosirian Statherian

Mesoproterozoic Era	Calymmian Ectasian Stenian

Neoproterozoic Era	Tonian Cryogenian Ediacaran

Followed by Phanerozoic Eon

Geologic history of Earth

Cenozoic era
(present–66.0 Mya)

Quaternary (present–2.58 Mya)	Holocene (present–11.7 kya) Pleistocene (11.7 kya–2.58 Mya)

Neogene (2.58–23.03 Mya)	Pliocene (2.58–5.333 Mya) Miocene (5.333–23.03 Mya)

Paleogene (23.03–66.0 Mya)	Oligocene (23.03–33.9 Mya) Eocene (33.9–56.0 Mya) Paleocene (56.0–66.0 Mya)

Mesozoic era
(66.0–252.17 Mya)

Cretaceous (66.0–145.0 Mya)	Late (66.0–100.5 Mya) Early (100.5–145.0 Mya)

Jurassic (145.0–201.3 Mya)	Late (145.0–163.5 Mya) Middle (163.5–174.1 Mya) Early (174.1–201.3 Mya)

Triassic (201.3–252.17 Mya)	Late (201.3–237 Mya) Middle (237–247.2 Mya) Early (247.2–252.17 Mya)

Paleozoic era
(252.17–541.0 Mya)

Permian (252.17–298.9 Mya)	Lopingian (252.17–259.8 Mya) Guadalupian (259.8–272.3 Mya) Cisuralian (272.3–298.9 Mya)

Carboniferous (298.9–358.9 Mya)	Pennsylvanian (298.9–323.2 Mya) Mississippian (323.2–358.9 Mya)

Devonian (358.9–419.2 Mya)	Late (358.9–382.7 Mya) Middle (382.7–393.3 Mya) Early (393.3–419.2 Mya)

Silurian (419.2–443.8 Mya)	Pridoli (419.2–423.0 Mya) Ludlow (423.0–427.4 Mya) Wenlock (427.4–433.4 Mya) Llandovery (433.4–443.8 Mya)

Ordovician (443.8–485.4 Mya)	Late (443.8–458.4 Mya) Middle (458.4–470.0 Mya) Early (470.0–485.4 Mya)

Cambrian (485.4–541.0 Mya)	Furongian (485.4–497 Mya) Series 3 (497–509 Mya) Series 2 (509–521 Mya) Terreneuvian (521–541.0 Mya)

Precambrian supereon
(541.0 Mya–4.567 Gya)

Proterozoic (541.0 Mya–2.5 Gya)	Neoproterozoic (541.0 Mya–1 Gya) Mesoproterozoic (1–1.6 Gya) Paleoproterozoic (1.6–2.5 Gya)

Archean (2.5–4 Gya)	Neoarchean (2.5–2.8 Gya) Mesoarchean (2.8–3.2 Gya) Paleoarchean (3.2–3.6 Gya) Eoarchean (3.6–4 Gya)

Hadean (4–4.567 Gya)	Neohadean (4–4.1 Gya) Mesohadean (4.1–4.3 Gya) Paleohadean (4.3–4.567 Gya)

kya = thousands years ago. Mya = millions years ago. Gya = billions years ago.
Source: (2015/01). International Commission on Stratigraphy. Retrieved 13 July 2015. Divisions of Geologic Time—Major Chronostratigraphic and Geochronologic Units USGS Retrieved 10 March 2013.

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