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15 Billion

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6 B

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3 B

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0 B

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Sun Born

Earth Born

Cryptic ERA4567.17-4150 mya

Basin Groups ERA 4150-3920 mya

Basin Groups ERA?4150-3920 mya

Nectarian Period ERA?3920-3850 mya

Lower Imbrian ERA?3850-3800 mya

Eoarchean ERA 3800-3600 mya

Paleoarchean ERA 3600-3200 mya

Mesoarchean ERA3200-2800 mya

Mesoarchean ERA 3200-2800 mya

Neoarchean ERA 2800-2500 mya

Siderian Period 2500-2300 Ma

Rhyacian Period 2300-2050MYA

Orosirian Period2050-1800 Ma

Orosirian Period 2050-1800 Ma

Statherian Period 1800 Ma to 1600 Ma

Calymmian Period 1600-1400 Ma

Ectasian Period 1400-1200MYA

Stenian Period 1200-1000 Ma

Tonian Period 1000-850 Ma

Cryogenian Period 800?-635

Ediacaran Period 635-542 Ma

Early or Lower Cambrian Epoch 542-513

Middle Cambrian Epoch 513-501

F u r o n g i a n Epoch 501-488	lower or early O r d o v i c i a n 488-471	Middle Ordovician	Upper/Late Ordovician	Ludlow	Wenlock	Llandovery	Lower or Early	Middle	Upper or Late	Lower or Early	Middle	Upper or Late
Camb.	Ordovician Period 488-443MYA ends with devastating ice age			Silurian Period 443-416 Ma Recovery of life			Devonian Period 416-359 Ma "The Age of Fish"			Carboniferous Period (Mississippian and Pennsylvanian in North America), 359-299 Ma

Permian Period 299-248 Ma end marked by major PT extinction event
L o p i n g i a n	G u a d a l u p i a n	C i s u r a l i a n

lower

middle

upper

lower

middle

upper

lower

upper

Cambrian Period 542-488 Ma

Triassic Period 248-205.7 Mya

Jurassic Period 205.7-144 Mya

Cretaceous Period 144.2-65.5 Mya

Paleogene Period 65-23 Mya

Neogene Period 23 Mya-present ?????

Paleoproterozoic ERA 2500-1600 mya

Mesoproterozoic ERA 1600-1000 mya

Neoproterozoic ERA 1000-542 mya

Paleozoic Era 542-251 MYA

Mesozoic Era 251-65 MYA

Cenozoic Era 65 MYA-present

Hadean Eon 4500 - 3800 Million Years Ago

Hadean Eon

Archean Eon 3800-2500 Million Years Ago (Mya)

Proterozoic Eon 2500-532 Million Years Ago (Mya)

Proterozoic Eon 2500-542 Million Years Ago (Mya)

Phanerozoic Eon 542Mya-Present

1st

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Sun Born

JavaScript Kit | CodingForums.com Copyright � 2005 Chris Center All rights reserved. sudden appearance and diversification of almost every major group (phylum) of animal life, as well as many types that later died out. Animals with shells and exoskeletons appeared for the first time (footnote).