Ratanpura Fm
Period:
Quaternary, Neogene
Age Interval:
Pliocene to early Pleistocene
Province:
Sri Lanka
Type Locality and Naming
Named after Ratanpura region (capital city of Sabaragamuwa Province, south-central Sri Lanka), which would be on the "Highland Complex" on the location map)
Synonym: Archaeol (lower)
[Figure: Generalized geologic map of Sri Lanka (from Edirisooriya et al., 2016, Geol. Mag. 155:907-920)]
Lithology and Thickness
Conglomerate to sand. Separated into 3 phases; with first (Phase I) being generally gravels; and Phases II and III as generally sands and gravels.
Lithology Pattern:
Conglomerate
Relationships and Distribution
Lower contact
Unconformity on underlying Precambrian crystalline rocks. Unconformity is from the Third (last) uplift of Sri Lanka/Ceylon region.
Upper contact
Locally conformable with Balangonda Fm ?
Regional extent
Ratanpura and Kuruvita areas
GeoJSON
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Fossils
Age
Pliocene-early Pleistocene
Age Span:
s
Beginning stage:
Zanclean
Fraction up in beginning stage:
0.5
Beginning date (Ma):
4.47
Ending stage:
Gelasian
Fraction up in the ending stage:
1.0
Ending date (Ma):
1.80
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Ravi Misra