Statements (27)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
sedimentary rock formation
|
| gptkbp:age |
gptkb:Precambrian
|
| gptkbp:alternativeName |
gptkb:BIFs
|
| gptkbp:composedOf |
gptkb:silica
iron oxides |
| gptkbp:depositionalEnvironment |
gptkb:marine
|
| gptkbp:disappeared |
oxygenation of atmosphere
|
| gptkbp:economicImportance |
iron mining
|
| gptkbp:firstDescribed |
19th century
|
| gptkbp:form |
precipitation of iron from ocean water
|
| gptkbp:foundIn |
gptkb:Australia
gptkb:Brazil gptkb:Canada gptkb:South_Africa |
| gptkbp:hasResource |
gptkb:fruit
magnetite hematite jasper |
| https://www.w3.org/2000/01/rdf-schema#label |
Banded Iron Formations
|
| gptkbp:layering |
alternating iron-rich and silica-rich bands
|
| gptkbp:oldestKnownAge |
about 3.8 billion years
|
| gptkbp:relatedTo |
gptkb:Great_Oxygenation_Event
|
| gptkbp:significance |
major source of iron ore
|
| gptkbp:thickness |
can be hundreds of meters
|
| gptkbp:youngestKnownAge |
about 1.8 billion years
|
| gptkbp:bfsParent |
gptkb:Great_Oxidation_Event
|
| gptkbp:bfsLayer |
7
|