Page 46 - GSATJanuary2020

Field Guide 43 FIELD GUIDE 43
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo, Geological Society of America Field Guide
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo,
Geology of the Baraboo, Wisconsin, Area:
Wisconsin, Area
Wisconsin, Area
Wisconsin, Area
Wisconsin, Area
Wisconsin, Area
Wisconsin, Area
Wisconsin, Area
Wisconsin, Area
Wisconsin, Area
Wisconsin, Area
Wisconsin, Area
Wisconsin, Area
Wisconsin, Area
Wisconsin, Area
Wisconsin, Area
Edited by Richard A. Davis Jr., Robert H. Dott Jr.,
and Ian W.D. Dalziel, 2016
With its wide variety of geological features and phenomena packed into
a small area, the Baraboo of south-central Wisconsin is among the most
Edited by R.A. Davis Jr., R.H. Dott Jr., and I.W.D. Dalziel
visited parts of the Midwest by geology students. This guidebook, the fi rst
comprehensive look at the area in decades, covers the spectrum of geo-
logical features present in the area, and it is useful as a teaching tool.
An exceptional outdoor classroom, the Baraboo area contains a spec-
trum of geology, including excellent examples of geomorphology, glacial
geology, structural geology, petrology, stratigraphy, and sedimentology.
Ages of the strata range from 1.7-billion-year-old Precambrian to the
Quaternary. The area has been studied for about a century, but it still
holds surprises for professionals and students alike.
Geology of the Baraboo, Wisconsin, Area
FLD043, 81 p., ISBN 9780813700434 | now $15.00 |
N O W O
Edited by Richard A. Davis Jr., Robert H. Dott Jr., and Ian W.D. Dalziel
Edited by Richard A. Davis Jr., Robert H. Dott Jr., and Ian W.D. Dalziel $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ 15 N
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BUY ONLINE } http://rock.geosociety.org/store/
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toll-free 1.888.443.4472 | +1.303.357.1000, option 3 | gsaservice@geosociety.org Y
Field Guide 43
Geologic
Geologic PRECAMBRIAN BDY. AGES (Ma) 541 635 720
Geologic
Geologic
Geologic
Geologic Time Scale Poster Time Scale Poster Time Scale Poster Time Scale Poster Time Scale Poster Time Scale Poster v. 5.0v. 5.0v. 5.0
PERIOD
ERA
EDIACARAN
PALEOZOIC
PICKS
TONIAN
(Ma)
TEROZOIC
AGE
Compiled by J.D. Walker, J.W. Geissman, GSA GEOLOGIC TIME SCALE v. 5.0 AGE (Ma) 750 EON NEOPRO- CRYOGENIAN 1000 1200
251 .90
254.14
STENIAN
EPOCH
CHANGHSINGIAN
259.1
AGE PERIOD
S.A. Bowring, and L.E. Babcock, 2018 MESOZOIC AGE PICKS 66.0 (Ma) Lopin- gian Guada- WUCHIAPINGIAN 265.1 268.8 272.95 290.1 1000 MESOPRO- ECTASIAN 1400 1600
CAPITANIAN
WORDIAN
(Ma)
~283.5
ROADIAN
KUNGURIAN
CALYMMIAN
TEROZOIC
lupian
SAKMARIAN
ASSELIAN
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- ARTINSKIAN 295.0 298.9 303.7 307 .0 315.2 1250 1500 PROTEROZOIC STATHERIAN 1800
POLARITY
lian
GZHELIAN
CAMPANIAN
KASIMOVIAN
MOSCOVIAN
BASHKIRIAN
version of GSA’s Geologic Time CENOZOIC AGE (Ma) 0.012 1 .8 70 30 C30 31 32 33 C31 C32 C33 LATE SANTONIAN 89.8 93.9 100.5 300 PENNSYL- VANIAN LATE EARLY SERPUKHOVIAN 323.2 330.9 1750 OROSIRIAN 2050
MIDDLE
CONIACIAN
TURONIAN
VISEAN
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- RHYACIAN 2300 2500
Scale (v. 5.0) to decorate your of ce
TEROZOIC
GELASIAN
PIACENZIAN
HOLOCENE
POLARITY
ZANCLEAN
PLEISTOCENE*
ALBIAN
POLAR
ATER-
C1 QUATER-
A
or classroom. AGE AGE (Ma) (Ma) (Ma) HIST HIST. . ANOM. ANOM. 1 1 CHRON CHRON. C1 QUATER- PLEI PLIOCENE MESSINIAN 7 .246 90 34 C34 CRETACEOUS 340 MISSIS- SIPPIAN EARLY FAMENNIAN ~372.2 SIDERIAN
NARY
NARY
C2
C2
2A 2 2 C2A C2A TORTONIAN 11.63 100 APTIAN ~125 ~129.4 FRASNIAN ~382.7 2250 2800
~387 .7
3 3 3 C3 C3 13.82 BARREMIAN ~132.9 360 LATE GIVETIAN ~393.3
5 3A C3A C3A SERRAVALLIAN 15.97 110 EARLY HAUTERIVIAN ~139.8 EIFELIAN 2500 NEOARCHEAN
GTSPOS | 20" × 26" | $9.95 4 4A C4 C4 C4 C4A C4A LANGHIAN 120 M0r VALANGINIAN ~145.0 380 DEVONIAN MIDDLE EMSIAN ~407 .6 ~419.2
~410.8
LOCHKOVIAN
~425.6
10 5 C5 C5 NEOGENE MIOCENE BURDIGALIAN 20.44 M1 M3 M5 BERRIASIAN ~152.1 PRAGIAN ~423.0 2750 MESO- 3200
~427 .4
5A 5A C5A C5A 23.03 130 M10 TITHONIAN ~157 .3 400 EARLY LUDFORDIAN ~430.5 ARCHEAN
~433.4
GORSTIAN
HOMERIAN
~440.8
5B 5B C5B C5 AQUITANIAN M12 M14 KIMMERIDGIAN ~163.5 PRIDOLI SHEINWOODIAN ~438.5
~443.8
15 5C 5C C5 C5C 140 M16 M18 ~166.1 LUDLOW TELYCHIAN ~445.2 3000
AERONIAN
5D 5D C5D C5E M20 LATE OXFORDIAN ~168.3 WENLOCK RHUDDANIAN ~453.0 3600
5E 5E 6 6 C6 CHATTIAN 27 .82 M22 CALLOVIAN ~170.3 420 LLANDO- HIRNANTIAN ~458.4 ARCHEAN
PALEO-
~174.1
KATIAN
BAJOCIAN
C6A 150 M25 BATHONIAN SILURIAN VERY SANDBIAN ~467 .3 3250 ARCHEAN
6A
6A
20 20 6B C6B M29 AALENIAN DARRIWILIAN ~470.0
6C C6C MIDDLE ~182.7 440 LATE ~477 .7
7 C7 C7A 160 TOARCIAN DAPINGIAN ~485.4 4000
7A C8 OLIGOCENE RUPELIAN 33.9 ~190.8 MIDDLE FLOIAN 3500
25 25 8 C9 JURASSIC PLIENSBACHIAN TREMADOCIAN ~489.5 EOARCHEAN
~494
9 170 460 ORDOVICIAN AGE 10
10 C10 ~199.3 EARLY JIANGSHANIAN ~497 ~500.5
~201 .3
11 C11 PRIABONIAN 37 .8 RAPID POLARITY CHANGES EARLY SINEMURIAN PAIBIAN ~504.5 3750
30 12 C12 C16 TERTIARY 180 HETTANGIAN ~208.5 480 FURON- GUZHANGIAN ~509 ~514
DRUMIAN
GIAN
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.
AGE 5
13 C13 C15 BARTONIAN 41 .2 RHAETIAN Epoch 3 AGE 4 AGE 3 ~521 4000 HADEAN
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,
15 190 ~529
35 16 17 C17 NORIAN 500 Epoch 2 AGE 2 541.0
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).
18 C18 LUTETIAN 47 .8 200 ~227 CAMBRIAN TERRE- FORTUNIAN
TRIASSIC
40 19 C19 EOCENE 210 LATE ~237 520 NEUVIAN
20 C20 PALEOGENE CARNIAN ~242
LADINIAN
540
247 .2
251 .2
45 YPRESIAN 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.CTS005R3C. ©2018 The Geological Society of America
ANISIAN
251 .90
21 C21 56.0 230 *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.
OLENEKIAN
MIDDLE
BUY ONLINE 55} http://rock.geosociety.org/store/
INDUAN
C22
22
THANETIAN
59.2
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.
50
C23
EARLY
23
240
61 .6
SELANDIAN
24
C24
26 25 C25 C26 PALEOCENE DANIAN 66.0 250 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.
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
46 GSA Today | January 2020