Tabla geocronologica

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Tabla geocronologica

  1. 1. INTERNATIONAL STRATIGRAPHIC CHART ICS International Commission on Stratigraphy Eonothem Eonothem Eonothem Eonothem Erathem Erathem Erathem Erathem System System System System Period Period Period Period Series Epoch Series Epoch Series Epoch GSSP GSSP GSSP GSSP GSSA Stage Stage Stage Eon Age Age Eon Age Age Eon Age Age Eon Age Era Era Era Era Ma Ma Ma Ma 145.5 ±4.0 359.2 ±2.5 542 Holocene Tithonian Famennian Ediacaran 0.0117 150.8 ±4.0 Upper 374.5 ±2.6 Neo- ~635 Quaternary Upper Upper Kimmeridgian Frasnian Cryogenian 0.126 ~ 155.6 385.3 ±2.6 proterozoic 850 Devonian “Ionian” Oxfordian Givetian Tonian Pleistocene 0.781 161.2 ±4.0 Middle 391.8 ±2.7 1000 Proterozoic Calabrian Callovian Eifelian Stenian 1.806 164.7 ±4.0 397.5 ±2.7 1200 Meso- Jurassic Gelasian Bathonian Emsian Ectasian 2.588 Middle 167.7 ±3.5 407.0 ±2.8 proterozoic 1400 Piacenzian Bajocian Lower Pragian Calymmian Pliocene 3.600 171.6 ±3.0 411.2 ±2.8 1600 Zanclean Aalenian Lochkovian Statherian Meso zoic 5.332 175.6 ±2.0 1800 Precambrian 416.0 ±2.8 Messinian Toarcian Pridoli Paleo- Orosirian Neogene 7.246 183.0 ±1.5 418.7 ±2.7 2050 Tortonian Pliensbachian Ludfordian proterozoic Rhyacian Cenozoic 11.608 Lower 189.6 ±1.5 Ludlow 421.3 ±2.6 2300 Serravallian Sinemurian Gorstian Siderian Miocene 13.82 196.5 ±1.0 2500 Silurian 422.9 ±2.5 Langhian Hettangian Homerian 15.97 199.6 ±0.6 Wenlock 426.2 ±2.4 Neoarchean Burdigalian Rhaetian Sheinwoodian 20.43 203.6 ±1.5 428.2 ±2.3 2800 Aquitanian Upper Norian Telychian Archean 23.03 216.5 ±2.0 436.0 ±1.9 Mesoarchean Phanerozoic Phanerozoic Phanerozoic Carnian Triassic Chattian Llandovery Aeronian Paleo zoic Oligocene 28.4 ±0.1 ~ 228.7 439.0 ±1.8 3200 Rupelian Ladinian Rhuddanian 33.9 ±0.1 Middle 237.0 ±2.0 443.7 ±1.5 Paleoarchean Priabonian Anisian Hirnantian ~ 245.9 Paleogene 37.2 ±0.1 445.6 ±1.5 3600 Bartonian Olenekian Upper Katian Eocene Lower ~ 249.5 Eoarchean Ordovician 40.4 ±0.2 455.8 ±1.6 Lutetian Induan Sandbian 48.6 ±0.2 251.0 ±0.4 460.9 ±1.6 4000 Ypresian Changhsingian Darriwilian 55.8 ±0.2 Lopingian 253.8 ±0.7 Middle 468.1 ±1.6 Hadean (informal) Thanetian Wuchiapingian Dapingian 58.7 ±0.2 260.4 ±0.7 471.8 ±1.6 ~4600 Paleocene Selandian Capitanian Floian ~ 61.1 265.8 ±0.7 Lower 478.6 ±1.7Subdivisions of the global geologic record are Permian Danian Guadalupian Wordian Tremadocian formally defined by their lower boundary. Each unit 65.5 ±0.3 268.0 ±0.7 488.3 ±1.7 of the Phanerozoic (~542 Ma to Present) and the Maastrichtian Roadian Stage 10 70.6 ±0.6 270.6 ±0.7 ~ 492 * base of Ediacaran are defined by a basal Global Campanian Kungurian Furongian Stage 9 Boundary Stratotype Section and Point (GSSP ), Paleo zoic 83.5 ±0.7 275.6 ±0.7 ~ 496 * whereas Precambrian units are formally subdivided Santonian Artinskian Paibian by absolute age (Global Standard Stratigraphic Age, Upper 85.8 ±0.7 Cisuralian 284.4 ±0.7 ~ 499 Coniacian Sakmarian Guzhangian GSSA). Details of each GSSP are posted on the Cambrian ICS website (www.stratigraphy.org). Mesozoic ~ 88.6 294.6 ±0.8 ~ 503 Cretaceous Turonian Asselian Series 3 Drumian Numerical ages of the unit boundaries in the 93.6 ±0.8 299.0 ±0.8 ~ 506.5 Phanerozoic are subject to revision. Some stages Cenomanian Gzhelian Stage 5 within the Cambrian will be formally named upon 99.6 ±0.9 Upper 303.4 ±0.9 ~ 510 * sylvanian international agreement on their GSSP limits. Most Carboniferous Albian Kasimovian Stage 4 Penn- 112.0 ±1.0 307.2 ±1.0 Series 2 ~ 515 * sub-Series boundaries (e.g., Middle and Upper Aptian Middle Moscovian Stage 3 Aptian) are not formally defined. 125.0 ±1.0 311.7 ±1.1 ~ 521 * Colors are according to the Commission for the Barremian Lower Bashkirian Stage 2 Geological Map of the World (www.cgmw.org). Lower 130.0 ±1.5 318.1 ±1.3 Terreneuvian ~ 528 * Hauterivian Upper Serpukhovian Fortunian 542.0 ±1.0 The listed numerical ages are from 'A Geologic sippian Time Scale 2004', by F.M. Gradstein, J.G. Ogg, Missis- ~ 133.9 328.3 ±1.6 Valanginian Middle Visean This chart was drafted by Gabi Ogg. Intra Cambrian unit ages A.G. Smith, et al. (2004; Cambridge University Press) 140.2 ±3.0 345.3 ±2.1 with * are informal, and awaiting ratified definitions. and “The Concise Geologic Time Scale” by J.G. Ogg, Berriasian 145.5 ±4.0 Lower Tournaisian 359.2 ±2.5 Copyright © 2009 International Commission on Stratigraphy G. Ogg and F.M. Gradstein (2008). August 2009

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