PalkStrait EarlyMiocene Fm
Period:
Neogene
Age Interval:
Early Miocene
Province:
SriLanka Palk Strait
Type Locality and Naming
Palk Strait (between Sri Lanka and India); composite of Wells Delft, PalkBay and Pesalai.
[Figure: Generalized geologic map of Sri Lanka (from Edirisooriya et al., 2016, Geol. Mag. 155:907-920)]
Lithology and Thickness
Limestone and marl. Ca. 400 m (Delft well) to 250 m (PalkBay well) of limestone (especially upper part) and calcareous claystone (especially lower part).
Lithology Pattern:
Shallow-marine marl
Relationships and Distribution
Lower contact
Conformable on PalkStrait Oligocene Fm
Upper contact
Conformably overlain by PalkStrait MiddleMiocene Fm
Regional extent
Found in Delft, PalkBay and Pesalai wells of Palk Strait (between Sri Lanka and southern tip of India)
GeoJSON
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Fossils
Benthic foraminifers of Miogypsina, Praeorbulina transitoria, Clobigerinoidus sicanes, Ammonia unbonata, and Clobigerinoidus cf. kugleri.
Age
Early Miocene
Age Span:
s
Beginning stage:
Aquitanian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
23.04
Ending stage:
Burdigalian
Fraction up in the ending stage:
1.0
Ending date (Ma):
15.99
Depositional setting
Inner to outer shelf
Depositional pattern:
Additional Information
Compiler:
Ravi Misra