Geologic Time

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  1. Name the hierarchy of geologic time
    Eon.Era.Period.Epoch.Age.Chron
  2. Describe the etymology of the 2 eons
    • Phanerozoic - Visible Life
    • Precambrian (supereon) - Before the Cambrian period (Proterozoic, Archean, Hadean eons)
  3. Describe the etymology of the 3 eras in the Phanerozoic eon
    • Cenozoic - New Life
    • Mesozoic - Middle Life
    • Paleozoic - Old Life
  4. Describe the etymology of the 3 periods in the Cenozoic era
    • Quaternary - younger than Tertiary
    • Neogene - Recent Born (aka upper Tertiary)
    • Paleogene - Old Born(aka lower Tertiary)
  5. Describe the etymology of the 2 epochs in the Quaternary period
    • Holocene - Wholly New
    • Pleistocene - Most New
  6. Describe the etymology of the 2 epochs in the Neogene period
    • Pliocene - More New (90% fossils still alive)
    • Miocene - Less New (18% fossils still alive)
  7. Describe the etymology of the 3 epochs in the Paleogene period
    • Oligocene - Few New
    • Eocene - Ealiest New (9.5% fossils still alive)
    • Paleocene - Old New
  8. Describe the etymology of the 3 periods in the Mesozoic era
    • Cretaceous - chalky
    • Jurassic - Jura mountains
    • Triassic - three
  9. Describe the etymology of the 6 periods in the Paleozoic era
    • Permian - Perm region in Russia
    • Carboniferous - Coal Bearing
    • Devonian - Devon region in England
    • Silurian - Silures tribe in Wales
    • Ordovician - Ordovices tribe in Wales
    • Cambrian - Wales
  10. How long were the eons?
    • Phanerozoic - 542 mya-present (542 my, 12% of earth's age)
    • Precambrian - 4600-542 mya (4057 my, 88% of earth's age)
  11. How long were the 3 Phanerozoic eons?
    • Cenozoic - 66 mya-present (66 my)
    • Mesozoic - 252-66 mya (186 my)
    • Paleozoic - 541-252 mya (289 my)
  12. How long were the 3 periods in the Cenozoic era?
    • Quaternary - 2.58 mya-present (2.58 my)
    • Neogene - 23-2.58 mya (20.42 my)
    • Paleogene - 66-23 mya (43 my)
  13. How long were the 3 periods in the Mesozoic era?
    • Cretaceous - 145-66 mya (79 my)
    • Jurassic - 201.3-145 mya (56.3 my)
    • Triassic - 252-201.3 mya (50.7 my)
  14. How long were the 6 periods in the Paleozoic era?
    • Permian - 298.9-252 mya (46.9 my)
    • Carboniferous - 358.9-298.9 mya (60 my)
    • Devonian - 419.2-358.9 mya (60.3 my)
    • Silurian - 443.8-419.2 mya (24.6 my)
    • Ordovician - 485.4-443.8 mya (41.6 my)
    • Cambrian - 541-485.4 mya (55.6 my)
  15. How long (millions of years) were the 11 ages of the Jurassic Period?
    • Upper Epoch: 163.5-145 mya - Tithonian (7.1), Kimmeridgian (5.2), Oxfordian (6.2)
    • Middle Epoch: 174.1-163.5 mya - Callovian (2.6), Bathonian (2.2), Bajocian (2), Aalenian (3.8)
    • Lower Epoch: 201.3-174.1 mya - Toarcian (8.6), Pliensbachian (8.1), Sinemurian (8.5), Hettangian (2)

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Author:
mikedutch
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296602
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Geologic Time
Updated:
2016-03-13 19:09:56
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Geologic Time Periods
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