Proterozoic Eon
E6725
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.
Observed surface forms (3)
| Surface form | Occurrences |
|---|---|
| Great Oxidation Event | 1 |
| Proterozoic | 1 |
| Proterozoic Eonothem | 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 (13)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Rodinia
this entity surface form:
Great Oxidation Event
this entity surface form:
Proterozoic Eonothem
subject surface form:
Pannotia
subject surface form:
Rodinia
this entity surface form:
Proterozoic