Statements (12)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
abbreviation
|
| gptkbp:age |
most BIFs formed between 3.8 and 1.8 billion years ago
|
| gptkbp:composition |
alternating layers of iron-rich minerals and silica (chert)
|
| gptkbp:describes |
Banded Iron Formations are distinctive units of sedimentary rock that are almost always of Precambrian age.
|
| gptkbp:economicImportance |
major source of iron ore
|
| gptkbp:field |
geology
|
| https://www.w3.org/2000/01/rdf-schema#label |
BIFs
|
| gptkbp:location |
found in regions such as Western Australia, South Africa, Canada, and Brazil
|
| gptkbp:significance |
evidence for the presence of oxygen in Earth's early atmosphere
|
| gptkbp:standsFor |
gptkb:Banded_Iron_Formations
|
| gptkbp:bfsParent |
gptkb:Banded_Iron_Formations
|
| gptkbp:bfsLayer |
8
|