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Balangonda Formation
Click to display on map of the Ancient World at:
Balangonda Fm base reconstruction

Balangonda Fm

Period: 
Quaternary

Age Interval: 
Pleistocene


Province: 
Sri Lanka

Type Locality and Naming

Named after Balangonda area (Ratnapura District, Sabaragamuwa Province, south-central Sri Lanka), which would be on the "Highland Complex" on the location map)

Synonym: Archaeol (upper)

[Figure: Generalized geologic map of Sri Lanka (from Edirisooriya et al., 2016, Geol. Mag. 155:907-920)]


Lithology and Thickness

Sandstone. 3 Phases: Lowest (Phase I) = Generally sands and gravels etc., of Balagonda area. Phases II and III = Laterite sand and gravels of Balagonda area


Lithology Pattern: 
Sandstone


Relationships and Distribution

Lower contact

Conformable on Ratanpura Fm (?), or Unconformity on underlying Precambrian

Upper contact

Locally conformably overlain by Residual Sandstones Fm (which is partly a soil development downward into this formation?)

Regional extent

Balangonda area (Ratnapura District, Sabaragamuwa Province, south-central Sri Lanka), which would be on the "Highland Complex" on the location map.


GeoJSON

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Fossils


Age 

Middle and late Pleistocene?

Age Span: 
s

    Beginning stage: 
Calabrian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
1.80

    Ending stage: 
Lt. Pleist.

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
0.01

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Ravi Misra