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CALL FOR APPLICATIONS

2020–2021 GSA-USGS

Congressional Science Fellowship

Application deadline: 15 Jan. 2020

Bring your science and technology expertise to Capitol Hill to work at the interface between
geoscience and public policy. The GSA-USGS Congressional Science Fellowship provides a rare
opportunity for a geoscientist to spend a year working for a member of Congress or congressional
committee. If you are a geoscientist with a broad scientific background, experience applying
scientific knowledge to societal challenges, and a passion for helping shape the future of the geo-
science profession, GSA and the USGS invite your application. The fellowship is open to GSA
members who are U.S. citizens or permanent residents. A Ph.D. at the time of appointment or a
master’s degree in engineering plus five years of professional experience is required.

Learn more at www.geosociety.org/csf or by contacting Kasey White, +1-202-669-0466, kwhite@geosociety.org.

Geologist gift-giving made easy!

Geologists may be some of the few who welcome a And if you have a stocking to fill, here are just some
lump of coal in their stockings, but the GSA book- of the gifts you’ll find for under $10:
store has what they really want this holiday season.
Visit the online store to find all of GSA’s current Geologic Time Scale Poster v. 5.0
books, selected books from other publishers, field The Geology of Plate Tectonics Chart
tools, charts, maps, and the 2020 GSA 12-month  Geology Terms in English and Spanish Pocket
calendar “Postcards from the Field.” Or surprise Guide
that lucky geologist with a journal subscription or
GSA membership. GSA Note Cards Featuring Stunning Geologic
Images (box of 10)
GSA GEOLOGIC TIME SCALE v. 5.0 AGE PRECAMBRIAN BDY. AGES (Ma) DoohicKey 6x Key Tool from Nite Ize ®
PALEOZOIC
EON
PERIOD
ERA
CENOZOIC MAGNETIC CHRON. MESOZOIC AGE PICKS (Ma) AGE PERIOD EPOCH AGE PICKS (Ma) (Ma) EDIACARAN 541 635
(Ma)
WUCHIAPINGIAN
MAGNETIC AGE PICKS (Ma) AGE (Ma) POLARITY HIST ANOM. PERIOD EPOCH 66.0 Lopin- CHANGHSINGIAN 254.14 251 .90 259.1 NEOPRO- CRYOGENIAN 720
AGE POLARITY PERIOD EPOCH 30 C30 MAASTRICHTIAN 72.1 gian CAPITANIAN 265.1 750 TEROZOIC TONIAN
(Ma) HIST. ANOM. CHRON. HOLOCENE CALABRIAN 1 .8 0.012 70 31 C31 260 Guada- WORDIAN 268.8
1 C1 QUATER- PLEISTOCENE* GELASIAN 2.58 32 C32 CAMPANIAN lupian ROADIAN 272.95 1000
2 C2 NARY PIACENZIAN 3.600 33 83.6 PERMIAN KUNGURIAN ~283.5 1000 STENIAN
2A C2A PLIOCENE ZANCLEAN 5.333 80 C33 LATE SANTONIAN 86.3 280 Cisura- ARTINSKIAN 290.1 1200 Gear Tie Key Ring by Nite
5 3 C3 MESSINIAN 7 .246 CONIACIAN TURONIAN 89.8 93.9 lian SAKMARIAN ASSELIAN 295.0 298.9 MESOPRO- ECTASIAN
3A C3A TORTONIAN 90 CENOMANIAN LATE KASIMOVIAN GZHELIAN 307 .0 303.7 1250 TEROZOIC 1400
4 4A C4 100.5 300 MOSCOVIAN
10 5 C4A C5 SERRAVALLIAN 11 .63 13.82 100 34 C34 CRETACEOUS ALBIAN PENNSYL- VANIAN MIDDLE EARLY BASHKIRIAN 315.2 323.2 1500 PROTEROZOIC CALYMMIAN 1600
5A LANGHIAN ~113 320 SERPUKHOVIAN 330.9
15 5B 5C C5A C5B C5C NEOGENE MIOCENE BURDIGALIAN 15.97 110 EARLY APTIAN ~125 340 CARBONIFEROUS MISSIS- SIPPIAN LATE MIDDLE VISEAN 346.7 1750 STATHERIAN 1800 ®
5D C5D C5E 20.44 120 BARREMIAN EARLY TOURNAISIAN 358.9 OROSIRIAN Ize in Blue or Neon Yellow
5E 6 C6 M1 M0r HAUTERIVIAN ~132.9 ~129.4 2050
20 6A C6A AQUITANIAN 23.03 130 M3 M5 360 FAMENNIAN 2000 PALEOPRO- TEROZOIC
6B C6B M10 VALANGINIAN ~139.8 ~372.2 RHYACIAN
6C C6C CHATTIAN M12 BERRIASIAN LATE FRASNIAN
25 7A 7 8 C7 C7A C8 27 .82 140 M14 M16 M18 M20 TITHONIAN ~145.0 ~152.1 380 DEVONIAN EIFELIAN GIVETIAN ~382.7 ~387 .7 2250 SIDERIAN 2300
9 C9 M22 KIMMERIDGIAN MIDDLE ~393.3 2500
30 10 11 C10 C11 OLIGOCENE RUPELIAN 150 M25 M29 LATE OXFORDIAN ~157 .3 ~163.5 400 EMSIAN PRAGIAN ~410.8 ~407 .6 2500
C12 12 C16 TERTIARY 33.9 160 CALLOVIAN ~166.1 EARLY LOCHKOVIAN ~419.2 NEOARCHEAN
13 C13 PRIABONIAN MIDDLE BATHONIAN BAJOCIAN AALENIAN ~170.3 ~168.3 ~174.1 420 PRIDOLI LUDLOW LUDFORDIAN GORSTIAN ~423.0 ~427 .4 ~425.6 2750 2800 ®
35 15 C15 37 .8 170 SHEINWOODIAN HOMERIAN ~430.5 ~433.4 NEW! Rite in the Rain Side
17 16 C17 BARTONIAN 180 RAPID POLARITY CHANGES JURASSIC TOARCIAN ~182.7 WENLOCK LLANDO- VERY TELYCHIAN AERONIAN RHUDDANIAN ~438.5 ~440.8 ~443.8 ~445.2 MESO-
18 40 45 19 20 21 C18 C19 C20 C21 PALEOGENE EOCENE LUTETIAN 41.2 47 .8 190 200 210 EARLY PLIENSBACHIAN RHAETIAN ~190.8 ~199.3 ~201 .3 ~208.5 440 460 480 ORDOVICIAN SILURIAN LATE MIDDLE EARLY FURON- HIRNANTIAN SANDBIAN DARRIWILIAN KATIAN FLOIAN AGE 10 ~453.0 ~458.4 ~467 .3 ~470.0 ~477 .7 ~489.5 ~485.4 ~494 3000 3250 3500 ARCHEAN ARCHEAN PALEO- ARCHEAN 3200 3600
Postcards Field 2020 50 55 60 65 22 23 24 25 26 27 C22 C23 C24 C25 C26 C27 28 29 30 C28 C29 C30 PALEOCENE YPRESIAN THANETIAN SELANDIAN DANIAN 56.0 59.2 61.6 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.CTS005R3C. ©2018 The Geological Society of America 4000 Spiral Notebook in Blaze Orange
SINEMURIAN
DAPINGIAN
HETTANGIAN
TREMADOCIAN
TRIASSIC
JIANGSHANIAN
NORIAN
GIAN
PAIBIAN
GUZHANGIAN
~500.5
~497
~504.5
LATE
DRUMIAN
EOARCHEAN
~509
AGE 5
CAMBRIAN
Epoch 3
3750
220
500
~227
AGE 4
~514
AGE 3
CARNIAN
Epoch 2
~521
230
~529
4000
AGE 2
from the
~237
520
NEUVIAN
FORTUNIAN
TERRE-
HADEAN
LADINIAN
~242
247 .2
ANISIAN
MIDDLE
240
541 .0
OLENEKIAN
*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 to 0.126 Ma, and Late from 0.126 to 0.0117 Ma.
540
251.2
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) , and Cohen et al. (2013, updated) compilations. Numerical age estimates
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 numerical age estimate typically indicates an associated error of ±0.4 to over 1.6 Ma.
INDUAN
EARLY
251.90
250
66.0
Cohen, K.M., Finney, S., and Gibbard, P.L., 2012, International Chronostratigraphic Chart: International Commission on Stratigraphy, www.stratigraphy.org (accessed May 2012). (Chart reproduced for the 34th International Geological Congress, Brisbane,
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://www.stratigraphy.org/index.php/ics-chart-timescale; accessed May 2018).
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.
REFERENCES CITED
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.
Australia, 5–10 August 2012.)
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30 GSA Today | December 2019