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GSA GEOLOGIC TIME SCALE v. 5.0 AGE (Ma) PRECAMBRIAN BDY. AGES (Ma) 541 635 72
PERIOD
ERA
EDIACARAN
CRYOGENIAN
PALEOZOIC
EON
PICKS
TONIAN
(Ma)
NEOPRO-
TEROZOIC
AGE
Compiled by J.D. Walker, J.W. Geissman, AGE PERIOD EPOCH CHANGHSINGIAN 251 .90 254.14 750 STENIAN
259.1
S.A. Bowring, and L.E. Babcock, 2018 MESOZOIC AGE PICKS 66.0 (Ma) Lopin- gian lupian WUCHIAPINGIAN 265.1 268.8 272.95 290.1 1000 MESOPRO- ECTASIAN
CAPITANIAN
WORDIAN
(Ma)
~283.5
ROADIAN
Guada-
KUNGURIAN
TEROZOIC
CALYMMIA
SAKMARIAN
Use this colorful, poster-size PICKS AGE (Ma) MAGNETIC HIST ANOM. CHRON. PERIOD EPOCH MAASTRICHTIAN 72.1 83.6 86.3 260 280 PERMIAN Cisura- lian ARTINSKIAN 295.0 298.9 303.7 307 .0 315.2 1250 1500 PROTEROZOIC STATHE
ASSELIAN
POLARITY
GZHELIAN
CAMPANIAN
KASIMOVIAN
MOSCOVIAN
BASHKIRIAN
version of GSA’s Geologic Time CENOZOIC AGE (Ma) 0.012 1.8 70 30 C30 32 C31 33 C32 C33 LATE SANTONIAN 89.8 93.9 100.5 300 PENNSYL- VANIAN LATE MIDDLE SERPUKHOVIAN 323.2 330.9 1750 OR
31
CONIACIAN
TURONIAN
EARLY
VISEAN
TEROZOIC
Scale (v. 5.0) to decorate your of ce MAGNETIC PERIOD EPOCH CALABRIAN 2.58 3.600 5.333 80 CENOMANIAN ~113 320 CARBONIFEROUS LATE MIDDLE TOURNAISIAN 346.7 358.9 2000 PALEOPRO-
GELASIAN
PIACENZIAN
HOLOCENE
ZANCLEAN
PLEISTOCENE*
POLARITY
CHRON.
or classroom. AGE (Ma) HIST. ANOM. 1 C1 QUATER- PLIOCENE MESSINIAN 7 .246 90 34 C34 CRETACEOUS ALBIAN 340 MISSIS- SIPPIAN EARLY FAMENNIAN ~372.2
NARY
C2
~387 .7
2A 2 C2A TORTONIAN 11 .63 100 APTIAN ~125 ~129.4 FRASNIAN ~382.7 2250
3 C3 13.82 ~132.9 360 LATE ~393.3
HAUTERIVIAN
EIFELIAN
5 3A C3A SERRAVALLIAN 110 EARLY BARREMIAN ~139.8 GIVETIAN 2500 NEOARCHEA
GTSPOS | 20" × 26" | $9.95 4 4A C4 C4A LANGHIAN 15.97 120 M0r VALANGINIAN ~145.0 380 DEVONIAN MIDDLE EMSIAN ~407 .6 ~419.2
~410.8
PRAGIAN
~425.6
10 5 C5 NEOGENE MIOCENE BURDIGALIAN 20.44 M1 M3 M5 BERRIASIAN ~152.1 LOCHKOVIAN ~423.0 ~427 .4 2750 MES
~433.4
5A C5A 23.03 130 M10 TITHONIAN ~157 .3 400 EARLY LUDFORDIAN ~430.5 ARC
GORSTIAN
HOMERIAN
~440.8
5B C5B AQUITANIAN M12 M14 KIMMERIDGIAN ~163.5 PRIDOLI SHEINWOODIAN ~438.5
~443.8
15 5C C5C C5D 140 M16 M18 ~166.1 LUDLOW TELYCHIAN ~445.2 3000
RHUDDANIAN
5D C5E M20 LATE OXFORDIAN ~168.3 WENLOCK AERONIAN ~453.0
5E C6 CALLOVIAN ~170.3 420 HIRNANTIAN ~458.4 ARCHEAN
6 CHATTIAN 27 .82 M22 BATHONIAN ~174.1 SILURIAN LLANDO- KATIAN
AALENIAN
20 6A C6A C6B 150 M25 M29 BAJOCIAN VERY SANDBIAN ~467 .3 3250
~470.0
6B DARRIWILIAN
6C C6C MIDDLE ~182.7 440 LATE ~477 .7
7 C7 C7A 160 TOARCIAN DAPINGIAN
7A C8 OLIGOCENE RUPELIAN 33.9 ~190.8 MIDDLE FLOIAN ~485.4 3500
25 8 C9 JURASSIC PLIENSBACHIAN TREMADOCIAN ~489.5
9 170 460 ORDOVICIAN ~494
AGE 10
10 C10 ~199.3 EARLY JIANGSHANIAN ~497 ~500.5
~201.3
11 C11 C16 TERTIARY PRIABONIAN 37 .8 RAPID POLARITY CHANGES EARLY SINEMURIAN FURON- PAIBIAN ~504.5 3750
New version | Same great price! 30 12 C12 C13 BARTONIAN 41.2 180 HETTANGIAN ~208.5 480 GIAN GUZHANGIAN ~514 ~521 4000
~509
DRUMIAN
AGE 5
RHAETIAN
AGE 4
15 13 C15 190 Epoch 3 AGE 3 ~529
35 16 C17 500 Epoch 2 AGE 2
17 NORIAN CAMBRIAN 541 .0
18 C18 LUTETIAN 47 .8 200 ~227 TERRE- FORTUNIAN
*The Pleistocene is divided into four ages, but only two are shown here. What is shown as Calabrian is actually three ages—Calabrian from 1.80 to 0.781 Ma, Middle from 0.781
TRIASSIC
The Cenozoic, Mesozoic, and Paleozoic are the Eras of the Phanerozoic Eon. Names of units and age boundaries usually follow the Gradstein et al. (2012), Cohen et al. (2012)
40 19 C19 EOCENE 210 LATE ~237 520 NEUVIAN
and picks of boundaries usually follow the Cohen et al. (2013, updated) compilation. The numbered epochs and ages of the Cambrian are provisional. A “~” before a numerica
20 C20 PALEOGENE CARNIAN ~242
Cohen, K.M., Finney, S., and Gibbard, P.L., 2012, International Chronostratigraphic Chart: International Commission on Stratigraphy, www.stratigraphy.org (accessed May 201
LADINIAN
247 .2
540
251.2
ANISIAN
45 21 C21 YPRESIAN 56.0 220 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, https://doi.org/10.1130/2018.CTS005
251.90
OLENEKIAN
BUY ONLINE 55` http://rock.geosociety.org/store/
MIDDLE
Gradstein, F.M, Ogg, J.G., Schmitz, M.D., et al., 2012, The Geologic Time Scale 2012: Boston, USA, Elsevier, https://doi.org/10.1016/B978-0-444-59425-9.00004-4.
230
INDUAN
C22
22
59.2
THANETIAN
Previous versions of the time scale and previously published papers about the time scale and its evolution are posted to http://www.geosociety.org/timescale.
C23
EARLY
50
23
240
61.6
SELANDIAN
24
C24
26 25 C25 C26 PALEOCENE DANIAN 66.0 250 Cohen, K.M., Finney, S.C., Gibbard, P.L., and Fan, J.-X., 2013, The ICS International Chronostratigraphic Chart: Episodes v. 36, no. 3, p. 199–204 (updated 2017, v. 2, http://ww
toll-free 1.888.443.4472 60 27 | 28 C27 C28 +1.303.357.1000, option 3 | gsaservice@geosociety.org
Australia, 5–10 August 2012.)
29 C29 REFERENCES CITED
65 30 C30
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