Proterozoic (2500 Ma)

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Representation and status

Color CMYK
0/80/35/0 (Commission for the Geological Map of the World)
Color RGB
R: 247 G: 53 B: 99
Rank
chronostratigraphic Eon
Validity
Unit is in Use
Status
valid formal name

Nomenclature

Deutsch
Proterozoikum
Français
Protérozoïque
Italiano
Proterozoico
English
Proterozoic (2500 Ma)
Historical Variants
Azoïque, Erdurzeit, Proterozoic (Chamberlain & Salisbury 1906), Eozoikum = Frühzeit (Roesli 1948)

Hierarchy and sequence

Subordinate units
Units at roof

Age

Age at top
  • Proterozoic
Age at base
  • Proterozoic

  • Neoproterozoic (1000 Ma)

    Rank
    chronostratigraphy
    Status
    valid
    In short
    Last era of the Proterozoic.
    Age
    Proterozoic
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    • Ediacaran (~ 635 Ma)

      Name Origin

      Named after the Ediacara Hills (South Australia).

      Rank
      chronostratigraphic Period
      Status
      valid
      In short
      Last period of the Neoproterozoic (ca. 635-541 Ma), with a peculiar soft-bodied fauna.
      Age
      Neoproterozoic (= Late Proterozoic)
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    • Cryogenian (~ 720 Ma)

      Name Origin

      From krýos and génesis (Greek), meaning "cold" resp. "birth".

      Rank
      chronostratigraphy
      Status
      valid
      In short
      Middle period of the Neoproterozoic, characterised by cold climatic conditions («Snowball Earth» ; Sturtian and Marinoan glaciations). Its base has been defined chronometrically.
      Age
      Neoproterozoic (= Late Proterozoic)
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    • Tonian (1000 Ma)

      Name Origin

      From tóno (Greek), meaning "stretch".

      Rank
      chronostratigraphy
      Status
      valid
      In short
      First period of the Neoproterozoic. Its base has been defined chronometrically.
      Age
      Neoproterozoic (= Late Proterozoic)
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  • Mesoproterozoic (1600 Ma)

    Rank
    chronostratigraphy
    Status
    valid
    Age
    Proterozoic
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    • Stenian (1200 Ma)

      Name Origin

      From stenós (Greek), meaning "narrow".

      Rank
      chronostratigraphy
      Status
      valid
      In short
      Last period of the Mesoproterozoic, during which the supercontinent Rodinia assembled. Its base has been defined chronometrically.
      Age
      Mesoproterozoic (= Middle Proterozoic)
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    • Ectasian (1400 Ma)

      Name Origin

      From éktasis (Greek), meaning "extension".

      Rank
      chronostratigraphy
      Status
      valid
      In short
      Second period of the Mesoproterozoic. Its base has been defined chronometrically.
      Age
      Mesoproterozoic (= Middle Proterozoic)
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    • Calymmian (1600 Ma)

      Name Origin

      From kálymma (Greek), meaning "cover".

      Rank
      chronostratigraphy
      Status
      valid
      In short

      First period of the Mesoproterozoic. Its base has been defined chronometrically.

      Age
      Mesoproterozoic (= Middle Proterozoic)
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  • Paleoproterozoic (2500 Ma)

    Rank
    chronostratigraphy
    Status
    valid
    Age
    Proterozoic
    Show details

    • Statherian (1800 Ma)

      Name Origin

      From statherós (Greek), meaning "stable, firm".

      Rank
      chronostratigraphy
      Status
      valid
      In short
      Last period of the Paleoproterozoic. Its base has been defined chronometrically.
      Age
      Paleoproterozoic (= Early Proterozoic)
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    • Orosirian (2050 Ma)

      Name Origin

      From oroseirá (Greek), meaning "mountain range".

      Rank
      chronostratigraphy
      Status
      valid
      In short

      Third period of the Paleoproterozoic. Its base has been defined chronometrically.

      Age
      Paleoproterozoic (= Early Proterozoic)
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    • Rhyacian (2300 Ma)

      Name Origin

      From rhýax (Greek), meaning "stream of lava".

      Rank
      chronostratigraphy
      Status
      valid
      In short
      Second period of the Paleoproterozoic : Bushveld Igneous Complex, Huronian (Makganyene) global glaciation. Its base has been defined chronometrically.
      Age
      Paleoproterozoic (= Early Proterozoic)
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    • Siderian (2500 Ma)

      Name Origin

      From sídēros (Greek), meaning "iron".

      Rank
      chronostratigraphy
      Status
      valid
      In short
      First period of the Paleoproterozoic, characterised by a peak in the deposition of banded iron formations (BIFs). Its base has been defined chronometrically.
      Age
      Paleoproterozoic (= Early Proterozoic)
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