Okwa Block
E786460
Okwa Block is an ancient geological terrane within the Kalahari Craton, composed mainly of Archean to Paleoproterozoic rocks that record early continental crust formation in southern Africa.
Statements (32)
| Predicate | Object |
|---|---|
| instanceOf |
crustal block
ⓘ
geological terrane ⓘ |
| associatedWith | Kalahari Craton evolution ⓘ |
| belongsTo | Precambrian shield provinces NERFINISHED ⓘ |
| composedOf |
Archean rocks
ⓘ
Paleoproterozoic rocks ⓘ |
| geologicalAge |
Archean
ⓘ
Paleoproterozoic ⓘ |
| hasLithology |
gneiss
ⓘ
granitoid rocks ⓘ greenstone remnants ⓘ high-grade metamorphic rocks ⓘ |
| hasOutcrops | central Botswana ⓘ |
| hasProcessEvidence |
crustal reworking
ⓘ
deformation ⓘ high-grade metamorphism ⓘ magmatic accretion ⓘ |
| locatedIn |
Botswana
NERFINISHED
ⓘ
southern Africa ⓘ |
| overlies | older Archean basement ⓘ |
| partOf |
African continental crust
ⓘ
Kalahari Craton NERFINISHED ⓘ |
| records | early continental crust formation ⓘ |
| researchField |
Precambrian geology
ⓘ
geochronology ⓘ tectonics ⓘ |
| significance |
constrains assembly of the Kalahari Craton
ⓘ
records early continental growth in southern Africa ⓘ |
| studiedUsing |
Nd isotopes
ⓘ
Pb isotopes ⓘ U-Pb zircon dating ⓘ |
| tectonicSetting | cratonic interior ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.