Proterozoic Eon

E6725

division of Precambrian time geologic eon

The Proterozoic Eon is a major division of Precambrian time, spanning from about 2.5 billion to 541 million years ago, marked by the buildup of atmospheric oxygen, the emergence of complex single-celled and early multicellular life, and the assembly of large continental landmasses.

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All labels observed (5)

Label	Occurrences
Proterozoic Eon canonical	25
Proterozoic	6
Great Oxidation Event	1
Proterozoic Eonothem	1
Proterozoic erathem	1

Statements (49)

Predicate	Object
instanceOf	division of Precambrian time ⓘ geologic eon ⓘ
associatedWith	decline of anaerobic microbial dominance ⓘ expansion of aerobic metabolisms ⓘ first known eukaryotic microfossils ⓘ first known multicellular algae ⓘ first macroscopic animal fossils in Ediacaran ⓘ oxygenation of surface oceans ⓘ rise of atmospheric oxygen to near-modern levels ⓘ
characterizedBy	Ediacaran biota ⓘ Proterozoic Eon self-linksurface differs ⓘ surface form: Great Oxidation Event Snowball Earth events ⓘ appearance of earliest animals ⓘ assembly of large continental landmasses ⓘ buildup of atmospheric oxygen ⓘ decline of banded iron formations after oxygen rise ⓘ development of plate tectonics similar to modern style ⓘ emergence of complex single-celled life ⓘ emergence of early multicellular life ⓘ evolution of algae ⓘ evolution of eukaryotes ⓘ first widespread glaciations ⓘ increased biological complexity ⓘ major changes in ocean chemistry ⓘ stabilization of continental cratons ⓘ supercontinent cycles ⓘ widespread banded iron formations in early Proterozoic ⓘ
chronostratigraphicUnit	Proterozoic Eon self-linksurface differs ⓘ surface form: Proterozoic Eonothem
contains	Mesoproterozoic Era from about 1.6 to 1.0 billion years ago ⓘ Neoproterozoic Era from about 1.0 billion to 541 million years ago ⓘ Paleoproterozoic Era from about 2.5 to 1.6 billion years ago ⓘ
duration	approximately 2 billion years ⓘ
endDefinedBy	base of Cambrian Period ⓘ
endTime	about 541 million years ago ⓘ
followedBy	Phanerozoic Eon ⓘ
followedByEvent	Cambrian explosion ⓘ
follows	Archean Eon ⓘ
geochronologicRank	eon ⓘ
includes	supercontinent Columbia (Nuna) ⓘ supercontinent Pannotia ⓘ supercontinent Rodinia ⓘ
locationInTimeScale	between Archean and Phanerozoic on geologic timescale ⓘ
partOf	Precambrian Supereon ⓘ
precededByEvent	Archean crust formation ⓘ
startTime	about 2.5 billion years ago ⓘ
subdivision	Mesoproterozoic Era ⓘ Neoproterozoic Era ⓘ Paleoproterozoic Era ⓘ
usedIn	International Commission on Stratigraphy ⓘ surface form: International Commission on Stratigraphy timescale

Referenced by (34)

Full triples — surface form annotated when it differs from this entity's canonical label.

Canadian Shield → geologicalEraFormation → Proterozoic Eon ⓘ

Proterozoic Eon → characterizedBy → Proterozoic Eon self-linksurface differs ⓘ

this entity surface form: Great Oxidation Event

Proterozoic Eon → chronostratigraphicUnit → Proterozoic Eon self-linksurface differs ⓘ

this entity surface form: Proterozoic Eonothem

Phanerozoic Eon → follows → Proterozoic Eon ⓘ

Precambrian Supereon → includes → Proterozoic Eon ⓘ

Archean Eon → precedes → Proterozoic Eon ⓘ

supercontinent Rodinia → geologicalEon → Proterozoic Eon ⓘ

subject surface form: Rodinia

supercontinent Rodinia → assembledDuring → Proterozoic Eon ⓘ

subject surface form: Rodinia

supercontinent Pannotia → geologicalEon → Proterozoic Eon ⓘ

subject surface form: Pannotia

Paleoproterozoic Era → partOf → Proterozoic Eon ⓘ

Neoproterozoic Era → partOf → Proterozoic Eon ⓘ

Mesoproterozoic Era → partOf → Proterozoic Eon ⓘ

MacDonnell Ranges → geologicalEra → Proterozoic Eon ⓘ

this entity surface form: Proterozoic

Vindhya Range → geologicalEra → Proterozoic Eon ⓘ

this entity surface form: Proterozoic

Laurentia → experiencedMajorGrowth → Proterozoic Eon ⓘ

Cryptozoic → includes → Proterozoic Eon ⓘ

Ediacaran Period → subdivisionOf → Proterozoic Eon ⓘ

Grenville orogeny → geologicEon → Proterozoic Eon ⓘ

Statherian Period → geologicEon → Proterozoic Eon ⓘ

Erathem → hasExample → Proterozoic Eon ⓘ

this entity surface form: Proterozoic erathem

Calymmian Period → geologicEon → Proterozoic Eon ⓘ

Ectasian Period → partOf → Proterozoic Eon ⓘ

Ectasian Period → eon → Proterozoic Eon ⓘ

Stenian Period → geologicEon → Proterozoic Eon ⓘ

Gaskiers glaciation → geologicalEon → Proterozoic Eon ⓘ

Siderian Period → timeScale → Proterozoic Eon ⓘ

Siderian Period → geologicEon → Proterozoic Eon ⓘ

Rhyacian Period → timeScale → Proterozoic Eon ⓘ

Rhyacian Period → geologicEon → Proterozoic Eon ⓘ

Orosirian Period → partOf → Proterozoic Eon ⓘ

Kata Tjuta → geologicalAge → Proterozoic Eon ⓘ

this entity surface form: Proterozoic

Nourlangie → geologicalEra → Proterozoic Eon ⓘ

this entity surface form: Proterozoic

Karlu Karlu → geologicalAge → Proterozoic Eon ⓘ

this entity surface form: Proterozoic

Baraboo Range → geologicalAge → Proterozoic Eon ⓘ

this entity surface form: Proterozoic