Paleoproterozoic Era
E44484
The Paleoproterozoic Era was an early division of Earth's history marked by the stabilization of continental cratons, widespread banded iron formations, and the Great Oxidation Event that significantly increased atmospheric oxygen.
Aliases (2)
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
geologic era
→
subdivision of the Proterozoic Eon → |
| associatedWithLife |
cyanobacterial mats
→
early eukaryote fossils (possible) → prokaryotic life → stromatolite abundance → |
| containsEvent |
Great Oxidation Event
→
Huronian glaciation → Lomagundi–Jatuli carbon isotope excursion → major orogenic events on several cratons → |
| containsSubdivision |
Orosirian Period
→
Rhyacian Period → Siderian Period → Statherian Period → |
| duration |
about 900 million years
→
|
| endTime |
approximately 1.6 billion years ago
→
|
| fieldOfStudy |
geology
→
paleobiology → paleoclimatology → |
| follows |
Archean Eon
→
|
| hasConsequence |
change in ocean chemistry
→
cooling of global climate → drawdown of atmospheric methane → possible trigger of Paleoproterozoic glaciations → widespread oxidation of iron in oceans → |
| hasFeature |
abundant banded iron formations in marine sediments
→
decline of banded iron formations toward its end → formation of red beds → oxidation of surface environments → rise of atmospheric oxygen above trace levels → sulfur mass-independent fractionation decline → |
| hasGeologicalRecord |
extensive metamorphic belts
→
large igneous provinces → rocks preserved on multiple cratons worldwide → |
| hasImpact |
establishment of modern-style biosphere–geosphere interactions
→
long-term habitability of Earth → |
| hasKeyFeature |
first long-lived continental cratons
→
|
| hasKeyProcess |
biological production of oxygen by cyanobacteria
→
development of plate tectonic style similar to modern → global-scale orogeny → growth of continental crust → intense weathering of continental surfaces → large-scale glaciations → oxygenation of Earth’s atmosphere → stabilization of continental cratons → widespread formation of banded iron formations → |
| namedAfter |
Greek words for "ancient" and "earlier life"
→
|
| partOf |
Proterozoic Eon
→
|
| precedes |
Mesoproterozoic Era
→
|
| startTime |
approximately 2.5 billion years ago
→
|
Referenced by (6)
| Subject (surface form when different) | Predicate |
|---|---|
|
Columbia
("Paleoproterozoic eon")
→
Nuna ("Paleoproterozoic eon") → |
formedIn |
|
Precambrian Supereon
→
|
contains |
|
Mesoproterozoic Era
→
|
follows |
|
Vredefort Dome
("Paleoproterozoic")
→
|
geologicalPeriod |
|
Proterozoic Eon
→
|
subdivision |