Science Olympiad Geologic Time Scale 2019

[Pages:1]Science Olympiad Geologic Time Scale 2019

Period

CENOZOIC

Epoch

Numeric Age (Ma)

MESOZOIC

Period

Epoch

Numeric Age (Ma)

Period

PALEOZOIC

Epoch

Numeric Age (Ma)

PRECAMBRIAN

Eon

Numeric Age (Ma)

QUATERNARY

Neogene

Holocene

0.012

Pleistocene

2.6

Pliocene

5.3

Miocene

23.0

Oligocene

33.9

Eocene

56.0

Paleocene

66.0

TRIASSIC

JURASSI C

Upper

100.5

Lower

145.0

Upper

163.5

Middle

174.1

Lower

Upper Middle Lower

201.3 237 247.2 251.9

CRETACEOUS

CAMBRIAN

ORDOVICIAN

SILURIAN

DEVONIAN

CARBONIFEROUS

Mississippian Pennsylvanian

PERMIAN

Upper

259.1

Middle

273.0

Lower

298.9

Upper

307.0

Middle

315.2

Lower

323.2

Upper

330.9

Middle

346.7

Lower

358.9

Upper

382.7

Middle

393.3

Lower

419.2

Pridoli 423.0

Ludlow 427.4

Wenlock 433.4

Llandovery 443.8

Upper

458.4

Middle

470.0

Lower

485.4

Furongian

497

Epoch 3

509

Epoch 2

521

Terreneuvian

541.0

PROTEROZOIC

2500

ARCHEAN

4000

HADEAN

4600

Modified from the following: GSA Geologic Time Scale v. 5.0 and International Chronostratigraphic Chart v. 2018/08

References:

Cohen, K.M., Harper, D.A.T., Gibbard, P.L. 2018. ICS International Chronostratigraphic Chart 2018/08. International Commission on Stratigraphy, IUGS. index.php/ics-chart-timescale (visited: 2018/08/15)

Walker, J.D., Geissman, J.W., Bowring, S.A., and Babcock, L.E., compilers. 2018. Geologic Time Scale v. 5.0: Geological Society of America. (visited: 2018/08/15)

**Explanation: Divisions of geologic time are not to scale.

Ma ? Millions of years ago The Cenozoic, Mesozoic, and Paleozoic are the Eras of the Phanerozoic.

TERTIARY Paleogene

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