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This is a list of official and unofficial names for time spans in the geologic timescale and units of chronostratigraphy. Since many of the smallest subdivisions of the geologic timescale were in the past defined on regional lithostratigraphic units, there are many alternative names that overlap. The body concerned with standardizing the names of geochronologic units is the International Commission on Stratigraphy (ICS). In 2008 however, even though the Phanerozoic eon is almost completely divided into internationally recognizable units, local subdivisions are often still preferred over the international ones. ==List== ||West, 1961 |- |Tiffanian |60.2 |56.8 |age |Paleocene |North America | | |- |Tiglian |2.40 |1.80 |super-age |Pleistocene |Netherlands |Tegelen (The Netherlands) | |- |Tinguirirican |36 |29 |age |Oligo-Eocene |South America | | |- |Tithonian |150.8 ± 4.0 |145.5 ± 4.0 |age |Jurassic |ICS |Tithon (Greek mythology) |Oppel, 1865 |- |Tiupampan |64.5 |62.5 |age |Paleocene |South America |Tiupampa |Marshall & de Muizon, 1988 |- |Toarcian |183.0 ± 1.5 |175.6 ± 2.0 |age |Jurassic |ICS |Thouars (France) |d'Orbigny, 1849 |- |Toyonian |518.5 |513.0 ± 2.0 |age |Cambrian |Russia, Kazakhstan | | |- |Tommotian |534 |530 |age |Cambrian |Russia, Kazakhstan | | |- |Tongaporutuan |10.9 |6.5 |age |Miocene |New Zealand | | |- |Tongrian | | |age |Oligocene |western Europe | | |- |Tonian |1,000 |850 |period |Proterozoic |ICS | | |- |Torrejonian |63.3 |60.2 |age |Paleocene |North America | | |- |Tortonian |11.608 |7.246 |age |Miocene |ICS |Tortona (Italy) |Mayer-Eymar, 1858 |- |Totomian |3.6 |3.0 |age |Pliocene |Japan | | |- |Tournaisian |359.2 ± 2.5 |345.3 ± 2.1 |age |Carboniferous |ICS |Tournai (Belgium) |Dumont, 1832 |- |Tozawan |15.97 |13.5 |age |Miocene |Japan | | |- |Treenean |0.15 |0.17 |chronozone |Pleistocene |Northwest Europe | | |- |Tremadoc(-ian) |488.3 ± 1.7 |478.6 ± 1.7 |epoch |Ordovician |ICS |Tremadoc Bay (Wales) |Sedgwick, 1846 |- |Trempealeauan |492.5 |488.3 ± 1.7 |age |Cambrian |North America | | |- |Trentonian | | |age |Carboniferous | |North America | | |- |Triassic |251.0 ± 0.4 |199.6 ± 0.6 |period |Mesozoic |ICS |''threefold'' |Von Alberti, 1834 |- |Tubantian |0.116 |0.0115 |age |Pleistocene |Netherlands (obsolete) | |Van der Vlerk & Florschütz, 1950 |- |Turolian |8.7 |4.9 |ELMMZ |Mio-Pliocene |Europe |''Turolium'', Latin for Teruel (Spain) |Crusafont, 1965 |- |Turonian |93.5 ± 0.8 |89.3 ± 1.0 |age |Cretaceous |ICS |Tours (France) |d'Orbigny, 1842 |- |Tuvalian |222.5 |217.4 ± 2.0 |sub-age |Triassic |Europe | | |- |Tyrrhenian |0.26 |0.01143 |sub-age |Pleistocene |Italy |Tyrrhenian Sea |Issel, 1914 |- |Ufimian |268 |270,6 |age |Permian |obsolete | | |- |Uintan |46.2 |42.0 |age |Eocene |North America | | |- |Ulangochuian |37.2 |35.1 |ALMA |Eocene |Asia | | |- |Ulatisian |51 |48 |age |Eocene |California | | |- |Ulsterian | | |age |Devonian |North America | | |- |Undillian |506 |504 |age |Cambrian |Australia | | |- |Uquian |3.0 |1.2 |age |Plio-Pleistocene |South America |Uquia (Argentina) |Castellanos, 1923 |- |Urutawan |108.4 |103.3 |age |Cretaceous |New Zealand | | |- |Vaalian |2,500 |2,050 |age |Proterozoic |South Africa | | |- |Valanginian |140.2 ± 3.0 |136.4 ± 2.0 |age |Cretaceous |ICS |Valangin (Switzerland) |Desor, 1853 |- |Vallesian |11.1 |8.7 |ELMMZ |Miocene |Europe |The Vallès (Spain) |Crusafont, 1950 |- |Vendian |~610 |542.0 ± 1.0 |subera |Proterozoic |worldwide (obsolete) | | |- |Venturian |2.2 |1.9 |age |Pleistocene |California | | |- |Vereiskian |311.7 ± 1.1 |309.2 |age |Carboniferous |Russia | | |- |Vierlandian | | |age |Miocene |Northern Germany | | |- |Vicksburgian | | |age |Oligocene |southern US | | |- |Villafranchian |3.5 |1.1 |ELMMZ |Plio-Pleistocene |Europe | | |- |Virgilian | | |age |Carboniferous |North America | | |- |Visean |345.3 ± 2.1 |326.4 ± 1.6 |age |Carboniferous |ICS |Visé (Belgium) |Dumont, 1832 |- |Vraconian | | |sub-age |Cretaceous |regional | | |- |Waalian |1.45 |1.20 |super-age |Pleistocene |Netherlands |river Waal | |- |Waiauan |12.7 |10.9 |age |Miocene |New Zealand | | |- |Waipawan |55.5 |53.0 |age |Eocene |New Zealand | | |- |Waipipian |3.60 |3.00 |age |Pliocene |New Zealand | | |- |Waitakian |25.2 |21.7 |age |Oligo-Miocene |New Zealand | | |- |Waitotaran |3.8 |3.1 |sub-age |Pliocene |New Zealand | | |- |Waltonian | |~2.52 |age |Pliocene |Great Britain |Walton-on-the-Naze |Harmer, |- |Wanganui |5.28 |present |epoch |Neogene-Quaternary |New Zealand |Wanganui | |- |Wangerripian | | |age |Paleo-Eocene |Australia | | |- |Warendian |485 |478.6 |age |Ordovician |Australia | | |- |Warthian |0.15 |0.13 |chronozone |Pleistocene |Northwest Europe | | |- |Wasatchian |55.4 |50.3 |age |Eocene |North America | | |- |Waucoban | | |epoch |Cambrian |North America | | |- |Weichselian |0.116 |0.0115 |age | |Northern Europe |Weichsel, German name for the river Vistula (Poland) | |- |Wenlock(-ian) |428.2 ± 2.3 |422.9 ± 2.5 |epoch |Silurian |ICS |Much Wenlock (England) |Murchison, 1833 |- |Werrikooian |1.00 |1.806 |age |Pleistocene |Australia | | |- |Westphalian |313.0 |303.9 |age |Carboniferous |Europe |Westphalia (Germany) |de Lapparent & Munier-Chalmas, 1892 |- |Whaingaroan |34.3 |27.3 |age |Oligocene |New Zealand | | |- |Wheelerian |1.9 |0.01143 |age |Pleistocene |California | | |- |Whiterockian |471.8 ± 1.6 |462 |age |Ordovician |North America | | |- |Whitlandian |475 |473.5 |age |Ordovician |Europe |Whitland (Wales) | |- |Whitneyan |33.3 |30.8 |age |Oligocene |North America | | |- |Whitwellian |426.2 ± 2.4 |425.4 |age |Silurian |regional |Whitwell Coppice (England) | |- |Wisconsinan |0.075 |0.01 |age |Pleistocene |North America | | |- |Wolfcampian | | |age |Permian |North America | | |- |Wolstonian |0.238 |0.128 |age |Pleistocene |Great Britain |Wolston (England) | |- |Woodbinian | | |age |Cretaceous |Gulf and Atlantic coast of the US | |Murray, 1961 |- |Wordian |268.0 ± 0.7 |265.8 ± 0.7 |age |Permian |ICS | | |- |Wuchenghuangtuan |2.4 |1.2 |age |Pleistocene |China | | |- |Wuchiapingian |260.4 ± 0.7 |253.8 ± 0.7 |age |Permian |ICS | | |- |Würm Glacial |0.116 |0.0115 |age |Pleistocene |Alps |river Würm (Germany) | |- |Wutaian |2,600 |2,350 |age |Archaean-Proterozoic |China | | |- |Xiaodushanian | |299 |age |Carboniferous |China | | |- |Xiushanian |429 |425.5 |age |Silurian |China | | |- |Yanguan |349.5 |345 |age |Carboniferous |China | | |- |Yarmouthian |0.26 |0.17 |age |Pleistocene |North America |Aegean Sea | |- |Yatalan |3.4 |2.0 |age |Plio-Pleistocene |Australia | | |- |Yeadonian |315.5 |314.5 |age |Carboniferous |regional |Yeadon (England) | |- |Younger Dryas |12,700 BP |11,560 BP |chron |Weichselian |Northern Europe |''Dryas octopetala'' (plant) | |- |Ypeenian |470 |468.1 |age |Ordovician |Australia | | |- |Ypresian |55.8 ± 0.2 |48.6 ± 0.2 |age |Eocene |ICS |''Ypres'', French name for Ieper () in Belgium |Dumont, 1849 |- |Ynezian |61.5 |55.8 |age |Paleocene |California | | |- |Yuian |9.5 |3.6 |age |Plio-Miocene |Japan | | |- |Yurmatian |1,375 |1,100 |age |Proterozoic |Russia | | |- |Yuzanjian |1.5 |0.75 |age |Pleistocene |Japan | | |- |Zanclean |5.332 |3.60 |age |Pliocene |ICS |''Zancla'', old name for Messina (Italy) |Sequenza, 1868 |- |Zechstein〔 |±270 |±250 |sub-period |Permian |Europe (unofficial) | | |- |Zemorrian |33.5 |22.0 |age |Oligo-Miocene |California | | |- |Zhungxian |505 |501 |age |Cambrian |China | | |- |Zuzhungian |509 |503 |age |Cambrian |China | | |} 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「List of geochronologic names」の詳細全文を読む スポンサード リンク
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