Siderian Period
E226913
The Siderian Period is the earliest division of the Paleoproterozoic, marked by widespread banded iron formation deposition and the initial rise of atmospheric oxygen on Earth.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Siderian Period canonical | 3 |
Statements (40)
| Predicate | Object |
|---|---|
| instanceOf |
chronostratigraphic unit
ⓘ
geologic period ⓘ |
| associatedWith | Great Oxidation Event ⓘ |
| atmosphericOxygenTrend | increasing ⓘ |
| biologicalContext | early evolution of oxygen-producing photosynthetic microorganisms ⓘ |
| biosphereImpact | onset of oxygen stress for anaerobic life ⓘ |
| category | Paleoproterozoic geologic period ⓘ |
| characterizedBy |
initial rise of atmospheric oxygen
ⓘ
widespread banded iron formation deposition ⓘ |
| chronologicalRank | period ⓘ |
| climateContext | precedes Paleoproterozoic glaciations ⓘ |
| earthHistoryRole | transition from Archean-style to Proterozoic-style Earth system ⓘ |
| end |
2.3 billion years ago
ⓘ
2300 million years ago ⓘ |
| environmentalChange |
decline in dissolved iron in the oceans
ⓘ
progressive oxygenation of Earth’s surface environments ⓘ |
| era | Paleoproterozoic Era ⓘ |
| followedBy | Rhyacian Period ⓘ |
| follows |
Archean Eon
ⓘ
Neoarchean Era ⓘ |
| geologicEon | Proterozoic Eon ⓘ |
| geologicRecord | preserved mainly in Precambrian shields ⓘ |
| globalSignificance | major transition in Earth surface redox state ⓘ |
| ironCycle | extensive precipitation of iron oxides ⓘ |
| lithostratigraphicExpression | banded iron formations ⓘ |
| lowerBoundaryAge | 2500 Ma ⓘ |
| nameEtymology | derived from Greek "sideros" meaning iron ⓘ |
| notableProcess |
formation of large iron ore deposits
ⓘ
oxidation of dissolved ferrous iron in oceans ⓘ |
| partOf | Paleoproterozoic Era ⓘ |
| positionInEra | earliest period of the Paleoproterozoic ⓘ |
| precededBy | low atmospheric oxygen levels of the Archean ⓘ |
| precedence | first period of the Proterozoic Eon ⓘ |
| start |
2.5 billion years ago
ⓘ
2500 million years ago ⓘ |
| stratigraphicBoundaryDefinition | defined by absolute age rather than a specific stratotype ⓘ |
| timeScale |
Precambrian
ⓘ
Proterozoic Eon ⓘ |
| upperBoundaryAge | 2300 Ma ⓘ |
| usedIn |
International Commission on Stratigraphy
ⓘ
surface form:
International Commission on Stratigraphy time scale
|
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.