Peninsular Gneiss
E340607
Peninsular Gneiss is an ancient, highly metamorphosed rock formation that forms part of the geological foundation of southern India and is prominently exposed at sites like Lalbagh’s famous rock outcrop in Bengaluru.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Peninsular Gneiss canonical | 2 |
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Archaean basement complex
ⓘ
geological formation ⓘ gneiss ⓘ metamorphic rock ⓘ |
| associatedWith | Dharwar Supergroup ⓘ |
| composition |
biotite
ⓘ
feldspar ⓘ hornblende ⓘ quartz ⓘ |
| contains |
felsic bands
ⓘ
mafic enclaves ⓘ |
| country | India ⓘ |
| exposedIn |
Dharwar Craton
ⓘ
surface form:
Karnataka craton
parts of Andhra Pradesh ⓘ parts of Tamil Nadu ⓘ |
| exposureType | inselnberg and rocky knolls ⓘ |
| formationProcess | high-grade regional metamorphism ⓘ |
| forms | basement for younger sedimentary sequences ⓘ |
| geologicalAge |
Archaean
ⓘ
Precambrian ⓘ |
| importance | key unit for understanding early crustal evolution of Indian subcontinent ⓘ |
| lithology |
banded gneiss
ⓘ
granite gneiss ⓘ migmatitic gneiss ⓘ |
| locatedIn |
Bengaluru
ⓘ
Karnataka ⓘ southern India ⓘ |
| metamorphicGrade | high-grade ⓘ |
| notableExposureAt |
Lalbagh Rock
ⓘ
surface form:
Lalbagh rock outcrop
|
| notableSite |
Lalbagh Botanical Garden
ⓘ
surface form:
Lalbagh Botanical Garden, Bengaluru
|
| partOf |
Indian Shield
ⓘ
Peninsular India ⓘ
surface form:
Peninsular India basement
|
| recognizedBy | Geological Survey of India ⓘ |
| scientificDiscipline | geology ⓘ |
| significance | forms geological foundation of southern India ⓘ |
| structuralFeature |
foliation planes
ⓘ
gneissic banding ⓘ |
| studiedIn |
geochronology
ⓘ
petrology ⓘ structural geology ⓘ |
| texture |
banded
ⓘ
foliated ⓘ |
| typeLocality | Bengaluru region ⓘ |
| underlies |
Dharwar Supergroup
ⓘ
surface form:
Dharwar greenstone belts
|
| usedFor |
geological education
ⓘ
petrological studies ⓘ |
| weatheringStyle | spheroidal weathering in some exposures ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.