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River Water Chemistry … Geologist's Wish List VOL. 30, NO. 3–4 | MARCH-APRIL 2020 ¡Cuba! River Water Chemistry … ✓ Pocket-Size Sand Grain Sizing Folder Geologist's✓ GSAWish Photo Scale / Time List Scale ✓ Wallet-Size Geologic Time Scale ✓ The Geoscience Handbook 2016: AGI Data Sheets, Fifth Edition Published by the American Geosciences Institute ® PRODUCTS NITE IZE ✓ DoohicKey 6x Key Tool ✓ Gear Tie Key Ring (Blue / Neon Yellow) ✓ S-Biner Ahhh 1 S-Biner Dual Carabiner Aluminum ⁄2" ✓ 3 x 7 (Lime Green / Orange) ⁄4" x 5" RITE-IN-THE-RAIN PRODUCTS 5 " x 7" ✓ Geology Field Bound Book, 4 ⁄8 ✓ Shirt Pocket Spiral Notebook, 3" (Yellow / Blue) 1 " x 5" ✓ Side Spiral Metric Notebook, 4 ⁄2 (Yellow / Blaze Orange) Field Book Pouch 1 ✓ ⁄4") 1 x 5 Black Field-Flex Memo⁄4 "Book, 3 ✓ to 3 ✓ Pocket Organizer Pouch ute Instit nces oscie (fi ts books up n Ge erica The Am NCE SCIE 6 GEO 201 E OK ition TH BO th Ed D s, Fif AN heet H ata S GI D A y iled b r omp ente C . Carp ne ark B M. Kea M tner hristopher Can C y Kat hics b Grap v. 4.0 PICKS (Ma) 66.0 AGE 72.1 EPOCH 83.6 MESOZOICMAASTRICHTIAN 86.3 PERIOD 89.8 MAGNETIC CAMPANIAN POLARITY CHRON. 93.9 ANOM. AGE HIST C30 SANTONIAN 30 100 (Ma) C31 CONIACIAN 31 LATE C32 TURONIAN 32 PICKS 70 33 GEOLOGIC TIME SCALEC33 (Ma) CENOMANIAN 113PALEOZOIC PRECAMBRIAN 0.01 GEOLOGICAL SOCIETY1.8 OF AMERICA ALBIAN BDY. 80 AGE PICKS AGE AGE 2.6 PERIOD EPOCH AGE EON ERA PERIOD AGES 3.6 (Ma) 126 (Ma) (Ma) (Ma) 5.3 31 90 APTIAN 1 541 CALABRIAN C34 34 GELASIAN 34 1 252 CENOZOICEPOCH 7.2 Lopin- CHANGHSINGIAN EDIACARAN PIACENZIAN 254 635 * 139 gian WUCHIAPINGIAN HOLOCENE ZANCLEAN 100 BARREMIAN260 260 . PERIOD CAPITANIAN NEOPRO- EARLY Guada-145 265 750 CRYOGENIAN MAGNETIC PLEISTOCENE HAUTERIVIAN WORDIAN POLARITY MESSINIAN 11.6 269 TEROZOIC N CHRO lupian . ROADIAN 850 . NOM A 2 QUATER-NARY PLIOCENE 110 VALANGINIAN 15 272 ST AGE HI C1 13.8 1 CRETACEOUS KUNGURIAN 279 TONIAN (Ma) C2 TORTONIAN BERRIASIAN280 157 2 Cisura- M0r 1000 1000 C2A 16.0 M1 PERMIAN ARTINSKIAN 2A 120 lian 4 M3 TITHONIAN 16 290 C3 M5 66 SAKMARIAN STENIAN 3 SERRAVALLIAN 1 296 168 ASSELIAN C3A M10 KIMMERIDGIAN 70 299 3A LANGHIAN 130 300 1 GZHELIAN 1200 5 20.4 M12 LATE 304 C4 1KASIMOVIAN74 1250 4 M14 LATE OXFORDIAN 307 MESOPRO- C4A M16 ECTASIAN 4A M18 CALLOVIANMIDDLE MOSCOVIAN 23.0 TEROZOIC 5 C5 M20 BURDIGALIAN 140 BATHONIANVANIAN 315 PENNSYL- 83 1400 M22 BAJOCIANEARLY 1 MIOCENE 320 BASHKIRIAN AALENIAN 10 C5A 323 5A M25 1500 CALYMMIAN AQUITANIAN 150 LATE SERPUKHOVIAN191 M29 MIDDLE TOARCIAN 331 C5B 28.1 5B NEOGENE 1600 C5C MIDDLE 199 5C C5D 340 VISEAN 1 MISSIS- 15 5D CHATTIAN 160 SIPPIAN 20 STATHERIAN C5E PLIENSBACHIAN 5E C6 347 1750 6 CHANGES CARBONIFEROUS EARLY TOURNAISIAN 1800 C6A SINEMURIAN 209 359 6A 33.9 170 EARLY C6B 360 20 6B HETTANGIAN C6C RUPELIAN JURASSIC FAMENNIAN OROSIRIAN 6C C7 RHAETIAN 2000 PROTEROZOIC 7 PALEOPRO- C7A 180 LATE 2050 7A C8 37.8 372 8 TEROZOIC RAPID POLARITY RAPID C9 CHANGES POLARITY RAPID FRASNIAN OLIGOCENE 380 228 25 9 383 RHYACIAN C10 PRIABONIAN 41.2 190 NORIAN 10 GIVETIAN C11 MIDDLE 388 2250 11 EIFELIAN 237 393 2300 C12 LATE 1 12 DEVONIAN BARTONIAN 200 24 30 400 EMSIAN SIDERIAN C13 CARNIAN 408 247 13 EARLY C15 PRAGIAN 250 47.8 411 525002 2500 15 C16 210 LADINIAN 25 16 LUTETIAN LOCHKOVIAN C17 ANISIAN419 35 17 420 PRIDOLI 423 LUDLOW LUDFORDIAN NEOARCHEAN GORSTIAN 426 220 OLENEKIANINDUAN 18 C18 MIDDLEHOMERIAN 427 WENLOCK SHEINWOODIAN 430 2750 19 C19 433 TRIASSIC TELYCHIAN 2800 LLANDO- 439 EOCENE AERONIAN 40 440230 VERY EARLY 441 20 C20 56.0 SILURIAN RHUDDANIAN 444 YPRESIAN HIRNANTIAN 445 KATIAN MESO- LATE 3000 59.2 240 453 ARCHEAN C21 SANDBIAN 21 458 45 PALEOGENE 460 DARRIWILIAN 61.6 MIDDLE C22 250 467 22 THANETIAN DAPINGIAN 3200 470 3250 C23 FLOIAN 23 SELANDIAN EARLY 478 50 66.0480 24 ORDOVICIAN TREMADOCIAN PALEO- C24 485 FURON- AGE 10 490 ARCHEAN DANIAN JIANGSHANIAN GIAN 494 3500 C25 PAIBIAN ARCHEANARCHEAN 55 25 497 500 GUZHANGIAN 501 3600 26 C26 Epoch 3 DRUMIAN PALEOCENE AGE 5 505 509 AGE 4 C27 514 3750 27 Epoch 2 EOARCHEAN 60 AGE 3 C28 520 28 521 AGE 2 C29 29 CAMBRIAN CAMBRIAN CAMBRIAN 529 TERRE- 4000 4000 C30 NEUVIAN 30 FORTUNIAN 65 HADEAN 540 541 © 2015 Get full-size chart: www.gsapubs.org 3300 Penrose Place • P.O. Box 9140 • Boulder, CO 80301-9140 1-888-443-4472 • 1-303-357-1000 • www.geosociety.org FIELD TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS TOOLS FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD FIELD } rock.geosociety.org/store/| [email protected] | +1.303.357.1000, option 3 Buy ONLINE.1988 1.800.472 toll-free MARCH-APRIL 2020 | VOLUME 30, NUMBER 3–4 SCIENCE 4 ¡Cuba! 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