Calymmian - Simple English Wikipedia, the free encyclopedia

The Calymmian is the first geological period in the Mesoproterozoic. It began 1.6 billion years ago and ended at 1.4 billion years ago.

In the period new land was formed. The supercontinent Columbia broke up during the Calymmian about 1.5 billion years ago.

Quaternary (the last 2.588 million years)	Holocene (the last 11,650 years) Pleistocene (11,650 years ago–2.588 million years ago)
Neogene (2.588 million years ago–23.03 mya)	Pliocene (2.588–5.333 mya) Miocene (5.333–23.03 mya)
Palaeogene (23.03 million years ago–66 mya)	Oligocene (23.03–33.9 mya) Eocene (33.9–56.0 mya) Palaeocene (56.0–66.0 mya)

Cretaceous (66 million years ago–145.0 mya)	Late (66.0–100.5 mya) Early (100.5–145.0 mya)
Jurassic (145 million years ago–201.3 mya)	Late (145.0–163.5 mya) Middle (163.5–174.1 mya) Early (174.1–201.3 mya)
Triassic (201.3–251.902 mya)	Late (201.3–237 mya) Middle (237–247.2 mya) Early (247.2–251.902 mya)

Permian (251.902–298.9 mya)	Lopingian (251.902–259.8 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) Miaolingian (497–509 mya) Series 2 (509–521 mya) Terreneuvian (521–541.0 mya)

Neoproterozoic era (541.0 mya–1 Gya)	Ediacaran (541.0–~635 mya) Cryogenian (~635–~720 mya) Tonian (~720 mya–1 Gya)
Mesoproterozoic era (1–1.6 Gya)	Stenian (1–1.2 Gya) Ectasian (1.2–1.4 Gya) Calymmian (1.4–1.6 Gya)
Palaeoproterozoic era (1.6–2.5 Gya)	Statherian (1.6–1.8 Gya) Orosirian (1.8–2.05 Gya) Rhyacian (2.05–2.3 Gya) Siderian (2.3–2.5 Gya)

Eras	Neoarchean (2.5–2.8 Gya) Mesoarchean (2.8–3.2 Gya) Palaeoarchean (3.2–3.6 Gya) Eoarchean (3.6–4 Gya)

kya = thousands years ago. mya = millions years ago. Gya = billions years ago.
See also: Geologic time scale,

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